Ministry of DefenceDefence Standard 80-41

Issue 3 Publication Date 10 March 2000

Paint, Finishing, Defence Equipment . att

Type: Brushing Spraying

DEF STAN 80-41/3

AMDNO

DATE OF ISSUE TEXT AF J IN.CTED SIGNATUREAND DATE

Revision Note

This Defence Standard has been reissued to :i Incorporate technical amendmentsii Combine the requirements of Def Stan 80-41 with Def Stan 80-153iii Remove the requirement to obtain Type Approval .

Historical Record

TS 10138A

dated 1 September 1976TS 10138B

dated 16 December 1977Def Stan 80-41/1 dated 02 September 1982Def Stan 80-41/2 dated 26 April 1990Def Stan 80-153/1 dated 20 September 1991

AMENDMENTS ISSUED SINCE PUBLICATION

PAINT, FINISHING, DEFENCE EQUIPMENT, MATT

TYPES: BRUSHINGSPRAYING

PREFACE

This Defence Standard supersedesDef Stan 80-41/Issue 2 dated 26 April 1991 and

Def Stan 80-153/Issue 1 dated 20 September 1991

1

DEF STAN 80-41/3

i This Defence Standard specifies the requirements for Paint, Finishing, Defence Equipment,Matt, Brushing and Spraying .

ii This Defence Standard has been produced on behalf of the Standardization Advisory Group(SAG) by the Paints Subcommittee (E 12) .

iii This Defence Standard has been agreed by the authorities concerned with its use and isintended to be used whenever relevant in all future designs, contracts, orders etc . and wheneverpracticable by amendment to those already in existence . If any difficulty arises which preventsapplication of the Defence Standard, the Directorate of Standardization shall be informed so thata remedy may be sought .

iv Any enquiries regarding This Defence Standard in relation to an invitation to tender or acontract in which it is incorporated are to be addressed to the responsible technical orsupervising authority named in the invitation to tender or contract .

v This Defence Standard has been devised for the use of the Crown and its contractors in theexecution of contracts for the Crown . The Crown hereby excludes all liability (other thanliability for death or personal injury) whatsoever and howsoever arising (including, but withoutlimitation, negligence on the part of the Crown its servants or agents) for any loss or damagehowever caused where the Standard is used for any other purpose .

2

DEF STAN 80-41/3

PAGECONTENTS

Preface 1

Section One. General

1 Scope 32 WARNING 33 Related Documents 34 Description 55 Information to be Supplied by the Purchaser 56 Keeping Quality 57 Quality Assurance 58 Containers and Marking of Containers 5

Section Two. Material

9 Composition 710 Testing 7

Table A Test Requirements 8

Annex A Preparation of Painted Test Panels A-1Annex B Determination of Fitness for Recoat B-1Annex C Determination of Resistance to Development of Sheen C-1Annex D Determination of Resistance to Mineral Oil D-1Annex E Determination of Resistance to Liquid Fuel E-1Annex F Determination of Resistance to Artificial Weathering F-1

PAINT. FINISHING. DEFENCE EOUIPMENT. MATTTYPES: BRUSHING AND SPRAYING

Section One . General

1 Scope

1.1 This Defence Standard specifies requirements for an air drying, near matt finishing paint .The paint is suitable for both interior and exterior use and may be used with an appropriatepriming paint and undercoat on prepared and/or pre-treated ferrous and non ferrous substrates .The paint finish is suitable for use on MOD vehicles and equipment where that coating is notrequired to be VOC compliant and/or Chemical Agent Resistant as defined in STANAG 4360 .Where these requirements are to be complied with, then the paint scheme Def Stan 80-208 shallbe specified.

1.2 Paint matching NATO Green, Colour No 285 of BS 381C is only available as a finishcomplying with the colour and Infix Red Reflectance (IRR) camouflage requirements defined inDef Stan 00-23. Paint matching Black, Light Stone (BS 381 C Colour No 361) and CamouflageDesert Sand (BS 381 C Colour No 380) shall meet the Infra Red Reflectance (IRR) camouflagerequirements defined in this Defence Standard.

2 WARNING

This Defence Standard calls for the use of substances and/or procedures that may be injurious tohealth if adequate precautions are not taken. It refers only to technical suitability and in no wayabsolves either the designer, the producer, the supplier or the user from statutory and all otherlegal obligations relating to health and safety at any stage of manufacture or use .

3 Related Documents

3.1. The following documents and publications are referred to in the text of this DefenceStandard.

Statutory Instrument The Chemicals (Hazard Information and Packaging for Supply)No 3247

Regulations (1984)BS EN ISO 1513

Paints and Varnishes. Examination and Preparation of Samples forTesting

BS EN ISO 1514

Paints and Varnishes. Standard Panels for TestingBS EN ISO 1517

Paints and Varnishes. Surface-drying Test. Ballotini MethodBS EN ISO 1519

Paints and Varnishes. Bend Test (Cylindrical Mandrel)BS EN ISO 2812-1

Paints and Varnishes. Determination of Resistance to LiquidsBS EN 23270

Specification for Temperature and Humidifies for Conditioning andTesting Paint Varnishes and their Raw Materials

BS EN 29117

Paints and Varnishes. Determination of Through-dry State andThrough-dry Time . Method of Test

BS 381C

Specification for Colours for Identification, Coding and SpecialPurposes

DEF STAN 80-41/3

3

DEF STAN 80-41/3

3.1 (Contd)

BS 3900BS 7664Def Stan 00-23

Def Stan 80-114Def Stan 80-126Def Stan 80-208

Def Stan 83-39Def Stan 91-42

STANAG 4360

Methods of Test for PaintsUndercoat and Finishing PaintsNATO Infra Red Reflective (IRR) Green Colour for Painting MilitaryEquipmentPaint, Priming, Defence EquipmentPaint, Priming, Zinc PhosphatePaint, Finishing, Polyurethane Multi-pack, Matt, Non Aircraft Use,Low VOCCloths, 3 x 1 Twill, CottonLubricating Oil, Petroleum : Compressor, Light : Joint ServiceDesignation OM-58 Lubricating Oil, Petroleum : Compressor, Medium:Joint Service Designation OM-160Specification of Paints and Paint Systems, Resistant to Chemical Agentsand Decontaminants for the Protection of Land Military Equipment

3.2 Reference in this Defence Standard to any related documents means in any invitation totender or contract the edition and all amendments current at the date of such tender or contractunless a specific edition is indicated.

3.3 The above series of documents are obtainable from the addresses shown below :

4

DOCUMENT SOURCE

Statutory InstrumentNo 3247

The Stationery OfficePO Box 276LONDON SW8 5DTTel 020 7873 9090Fax 020 7873 8200

British Standards (BS) British Standards InstitutionCustomer Service389 Chiswick High RoadLONDON W4 4ALTel 020 8996 7000Fax 020 8996 7001

Defence StandardsSTANAG

Ministry of DefenceDirectorate of StandardizationKentigern House65 Brown StreetGLASGOW G2 8EXTel 0141 224 2531Fax 0141 224 2503

4 Description

4.1 A finishing paint suitable for application by brushing or spraying to provide, a matt, durableand fuel resistant finish. Certain colours Black, No 285 (NATO Green), 361 (Light Stone) and380 (Camouflage Desert Sand) of BS 381C, shall have specified IRR camouflage requirements .

4.2 The normal system applied to prepared and/or pre-treated substrates is one coat of a suitablepriming paint e.g. Def Stan 80-114 for non ferrous substrates, Def Stan 80-126 for ferroussubstrates, followed by two coats of the finishing paint .

4.3 Where an undercoat is required to increase film build and provide improved durability, itshall be solvent based and comply with the requirements of BS 7664 in an appropriate colour . Inthe case of finish colour to NATO Green, the undercoat colour shall be Dark Admiralty Grey(BS 381 C Colour No 632) .

4.4 The paint is available in a limited range of colours normally selected from BS 381C .

5 Information to be supplied by the Purchaser

The purchaser shall state clearly in the contract or order :

The colour and Type, e .g. brushing, of the paint required.

6 Keeping Ouality

The paint, when stored in its original sealed container at a temperature between 0 and 35°C,shall retain the properties described in this Defence Standard for a period, from the date ofdispatch by the manufacturer to the customer, of not less than 12 months .

7 Ouality Assurance

7.1 Each batch shall comply with the test requirements of Table A .

7.2 If any sample is found not to conform to this Defence Standard, the whole batch shall berejected .

8 Containers and Marking of Containers

8.1 The paint shall be filled into sound, clean and dry containers suitable for the product . Tradepattern containers will be accepted unless otherwise specified in the contract .

8.2 It is the responsibility of the manufacturer to mark containers in accordance with any legalrequirements ; in addition, the containers constituting a consignment shall each be legibly anddurably marked with the following details :

5

DEF STAN 80-41/3

DEF STAN 80-41/3

Designation of the material (as shown in the title of this DefenceStandard)Standard number, viz. Def Stan 80-41/3Distinctive batch numberContract No (if appropriate)ColourType e.g. brushingDate of dispatch by the manufacturer to the customerManufacturer's name, initials or recognized trade mark

and such other markings as may be prescribed in the terms of the contract .

6

Section Two. Materials

9 Composition

9.1 The binder shall consist of silicon modified alkyd resin having a silicon (Si) content of>_ 6% m/m of the resin solids .

9.2 The paint shall be manufactured using light-fast, durable pigments and be capable ofproducing, where appropriate, material with the required IRR .

9.3 The pigmentation of a white finish shall be essentially based upon titanium dioxide .

9.4 The total lead content of the finish paint and undercoat (if required) shall be lower than thatstipulated for labelling as a lead containing paint under Statutory Instrument No 3247 .

10 Testing

10.1 Test conditions. Unless otherwise specified, all tests shall be carried out at the conditionsspecified in BS EN 23270 .

10.2 Condition

10.2.1 When the paint in the original container or in the laboratory sample containers isexamined in accordance with BS EN ISO 1513, it shall be free from extraneous matter and shallnot show hard settling, objectionable skinning, tendency to gel or any other defects .

10.2.2 The material shall be in a condition such that stirring easily produces a smooth, uniformpaint suitable for application by brushing or spraying as specified.

10.2.3 The paint thus prepared shall be used for the preparation of test panels (see annex A) .

10.3 Test requirements. A sample taken from any portion of the supply shall comply with therequirements of Table A

DEF STAN 80-41/3

7

DEF STAN 80-41/3

Table A

Test Requirements

8

(Concluded on page 9)

TESTNO

PROPERTY SUBSTRATE REQUIREMENT METHODOF TEST

1 Flash point - >_ 32°C BS 3900:Part A13

2 Opacity Black and whitesealed card

White > 80 %All other colours > 90

BS 3900:Part D4

3 Applicationproperties and

Two coat system,burnished steel,

Smooth, even, opaque finish,free from runs, sags or other

Visual, 24 hours afterapplication of the final coat

finish 300 x 100 mm orlarger

defects

4 Colour Two coat System,burnished tinplate

NATO Green:Comply with Def Stan 00-23clause 5.2

All other colours :Match the colour specified bythe purchaser

BS 3900:Part D8, D9 andD 10, 24 hours afterapplication of the final coat

BS 3900:Part D1 underdiffuse daylight, 24 hoursafter application of the finalcoat

5 Surface-dry time Single coat,burnished tinplate

<_ 4 hours BS EN ISO 1517

6 Hard-dry time Single coat,burnished tinplate

<_ 6 hours BS EN 29117

7 Fitness for recoat Single coat,burnished tinplate

No signs of incompatibilitybetween the coats

Annex B

8 Specular gloss Two coat system, 7 to 10 units BS 3900:Part D5, using aburnished tinplate 60° geometry gloss meter,

24 hours after application ofthe final coat

9 Development ofsheen

Two coat system,burnished tinplate

No significant change insheen

Annex C, 96 hours afterapplication of the final coat

10 Bend test Single coat, acidchromate pickled

No cracking or loss ofadhesion

BS EN ISO 1519, Type 1apparatus, 6 mm mandrel, 7

soft aluminium days after application of the 'final coat

Table A (Concluded)

DEF STAN 80-41/3

9

TESTNO

PROPERTY SUBSTRATE REQUIREMENT METHODOF TEST

11 Scratch resistance Single coat, No penetration to the substrate BS 3900:Part E2 using aburnished tinplate load of 1000g, 7 days after

application

12 Infra-redreflectance

Three coat system,burnished tinplate

NATO Green:Comply with clause 5.1 ofDef Stan 00-23

Black:< 10 % at all wavelengthsbetween 700 and 1200 nm

Light Stone :

45 ± 5 % at all wavelengthsbetween 700 and 1200 nm

Camouflage Desert Sand :

45 ± 5 % at all wavelengthsbetween 700 and 1200 nm

Def Stan 00-23, Annex A,24 hours after applicationof the final coat

13 Resistance to Single coat, No deterioration of the film Annex D, 96 hours aftermineral oil burnished tinplate application

14 Resistance toliquid fuel

Single coat,burnished tinplate

No deterioration of the film orexposure of the substrate

Annex E, 96 hours afterapplication

15 Resistance toimpact

Single coat,burnished tinplate

No cracking or loss ofadhesion

BS 3900:Part E3, 2 .5 mmindentation, paint filmfacing upwards, 7 daysafter application

16 Resistance toartificial

Three coat system,burnished steel

No chalking, checking,cracking, blistering, loss of

Annex F for a period of 16weeks, 7 days after

weathering adhesion or other defects .Little or no colour change .

NATO Greencolour change : _< 1 .5 DE units

Infra red reflectance: to remainwithin specified original limits

application of the final coat

DEF STAN 80-41/3

Collation Page

10

DEF STAN 80-41/3ANNEX A

Preparation of Painted Test Panels

A.1 Procedure

A.1.1 For the purposes of tests 3 to 16 inclusive of table A, use test panels complying with andprepared in accordance with the relevant requirements of BS EN ISO 1514 .

A.1.2 Where a two coat system is specified, apply to the test panels one coat of primercomplying with and applied in accordance with Def Stan 80-126 and one coat of the finishingpaint. Allow the primer to dry for 24 hours at the conditions specified in BS EN 23270 beforeapplication of the finishing paint . Where a three coat system is specified, allow the two coatsystem to dry for 24 hours at the conditions specified in BS EN 23270 and then apply a secondcoat of the finishing paint .

A.1.3 Apply the paint by the appropriate method to the specified type of panel and allow to dryin a vertical attitude with free access of air for the specified time at the conditions specified inBS EN 23270 .

A.1.4 Apply the paint to the test panels at a spreading rate sufficient to produce a single dry coatwith a mass as follows :

DENSITY OF THE PAINT IN THEPREPARED FOR USE CONDITION

9/ml

MASS/UNIT AREA OF THE DRIED FILMg/m2

Up to 1 .3

Over 1 .3 and up to 1 .6

40±5

50 ± 5

DEF STAN 80-41/3ANNEX A (Concluded)

Collation Page

DEF STAN 80-41/3ANNEX B

Determination of Fitness for Recoat

B.1 Allow the paint to dry for 16 hours and then apply a further coat of the material under test .

B.2 Allow the panel to dry with free access of air for 24 hours and examine for signs ofincompatibility.

B-1

DEF STAN 80-41/3ANNEX B (Concluded)

Collation Page

Determination of Resistance to Development of Sheen

C.1 Apparatus

C.1.1 A suitable weight with a base approximately 25 x 25 mm and a mass of (230 ± 5) g .

C.1.2 Cloth, Drill, No 2 White, Pattern No T8078A complying with Def Stan 83-39 .

C.2 Procedure

C.2.1 Prepare a rubbing pad by covering the base of the weight with two thicknesses of thecloth, the face (twill surface) being outermost . Bring the cloth up the sides of the weight andfasten with a suitable clip ensuring that there are no folds or creases on the base of the pad .Use a new piece of cloth for each test .

C.2.2 Place the panel on a flat horizontal surface and add (5 ± 1) ml of mineral oil, OM-58complying with Def Stan 91-42 . Place the pad on the oiled surface and push it to and frolongitudinally along the centre of the panel and parallel to the long edge taking care to applyonly horizontal thrust with the hand. Continue the to and fro motion 125 times takingapproximately 4 minutes . On completion of the rubbing cycle wash the panel free from oilwith white spirit, allow to dry and then examine the rubbed area .

DEF STAN 80-41/3ANNEX C

DEF STAN 80-41/3ANNEX C (Concluded)

Collation Page

Determination of Resistance to Mineral Oil

D.1 Apvaratus

An oven capable of maintaining a temperature of (50 :1: 2) °C.

D.2 Procedure

D.2.1 Test the painted panel in accordance with BS EN ISO 2812-1, Method 1, Procedure Ausing mineral oil OM 58 complying with Def Stan 91-42, at a temperature of (50 ± 2) °C .

D.2.2 Immerse half the panel for a period of 2 hours . Remove the panel and wipe with a padof cotton wool soaked in white spirit to remove excess oil, allow to cool and examine the areawhich has been immersed .

DEF STAN 80-41/3ANNEX D

DEF STAN 80-41/3ANNEX D (Concluded)

Collation Page

Determination of Resistance to Liquid Fuel

E.1 Test the paint system in accordance with BS EN ISO 2812-1, Method 1, Procedure A,using a 30/70 v/v mixture of toluene and 2, 2, 4-trimethylpentane . Both reagents shall be of notless than 99% purity.

E.2 Immerse half the panel for a period of five minutes . Remove the panel and dry by dabbingwith absorbent paper or cloth.

E.3 Immediately test the immersed portion of the paint film in accordance with clause 9 .3 .3 ofBS EN 29117 .

DEF STAN 80-41/3ANNEX E

DEF STAN 80-41/3ANNEX E (Concluded)

Collation Page

Determination of Resistance to Artificial Weathering

F.1 Procedure

F.1.1 Test the panel in accordance with BS 3900 :Part F16 using UVA 351 lamps .

F.1.2 Remove the panel, allow to stand for 24 hours at the conditions specified inBS EN 23270 and then examine.

F.1.3 For all IRR colours in Table A, determine the infra red reflectance of the exposed panelin accordance with Def Stan 00-23 Annex A and, using an unexposed panel as a control,determine the colour change of the exposed NATO Green colour panel in accordance with BS3900:Part D8, D9 and D10 .

DEF STAN 80-41/3ANNEX F

DEF STAN 80-41/3

ANNEX F (Concluded)

Collation Page

1

Inside Rear Cover

© Crown Copyright 2000

Copying Only as Agreed with DStan

Defence Standards are Published by and Obtainable from :

Defence Procurement AgencyAn Executive Agency of The Ministry of Defence

Directorate of StandardizationKentigern House65 Brown Street

GLASGOW G2 8EX

DStan Helpdesk

Tel 0141 224 2531/2Fax 0141 224 2503

Internet e-mail enquiries@dstan.mod.uk

File Reference

The DStan file reference relating to work on this standard is D/DStan/80/41 .

Contract Requirements

When Defence Standards are incorporated into contracts users are responsible for their correctapplication and for complying with contractual and statutory requirements . Compliance with aDefence Standard does not in itself confer immunity from legal obligations .

Revision of Defence Standards

Defence Standards are revised as necessary by up issue or amendment . It is important thatusers of Defence Standards should ascertain that they are in possession of the latest issue oramendment. Information on all Defence Standards is contained in Def Stan 00-00 Standardsfor Defence Part 3 , Index of Standards for Defence Procurement Section 4 `Index of DefenceStandards and Defence Specifications' published annually and supplemented regularly byStandards in Defence News (SID News) . Any person who, when making use of a DefenceStandard encounters an inaccuracy or ambiguity is requested to notify the Directorate ofStandardization (DStan) without delay in order that the matter may be investigated andappropriate action taken .