Download - impregnated paper.pps
![Page 1: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/1.jpg)
Replacing varnishes on architectural drawings on impregnated paper
Rita UdinaPaper & book restorer. Barcelona (SPAIN)
Symposium Technical drawings and their Reproductions The Hague 6-7 October 2014
![Page 2: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/2.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Shellac Transparency
![Page 3: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/3.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Shellac Oxidation (yellowing)
![Page 4: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/4.jpg)
Oxidation Fragility Cuts
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
![Page 5: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/5.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Bends Cuts …. Scotch tape
Fragility
![Page 6: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/6.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Cracks, tears
![Page 7: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/7.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Goals to achieve with the restoration treatment:
• Stop oxidation, or even revert some of its consequent acidification.
• Retrieve lost flexibility.More flexible Less consolidation (layers) needed
![Page 8: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/8.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Being aware of:• Importance of transparency
main purpose from the addition of shellac).
• Strict maintenance of scale(plans/maps).
Less important:
• YellowingConsequence with no damage by itself.
![Page 9: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/9.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Shellac
• Transparency,• Oxidation• Brittleness
Other varnish
• Transparency,• RedOx stable• Flexibility
Maintenance of scale:Avoid aqueous treatments?
![Page 10: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/10.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Treatment case 1
• Impregnated laid paper
• 1918
• Ink, watercolour.
• Several fragments (40 x 60 cm aprox.)
• 90 µ thick
![Page 11: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/11.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Treatment case 1
![Page 12: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/12.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Treatment case 1. After varnish removal (ethanol)
Loss of transparency (watercolour seen only on the back)
![Page 13: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/13.jpg)
Flattening,Adding missing areas
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Washi paper + paste
Lining
Apply varnish
Watercolour shows again Paraloid B72, 50gr/L
Tainted washi paper+ Beva Film(+ Klucel )
Treatment case 1
![Page 14: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/14.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Treatment case 1
cracks
tears
![Page 15: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/15.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Results
![Page 16: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/16.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Characteristics Before After
Innocuous
Transparency Good, though not excellent when lining.
Intense colour tone OK
ScaleGuaranteed even with aqueous treatments
Detrim
ental
Ongoing oxidationDue to shellac
--- Significantly reduced
Acidity pH=5,0 pH=7,0Significantly reduced when aqueous tretament is possible
BrittlenessUnsafe
handlingSafe
handlingExcellent improvement
Yellowing A lot Still a lot Insignificant improvement
![Page 17: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/17.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Characteristics Before After
Innocuous
Transparency Good, though not excellent when lining.
Intense colour tone OK
ScaleGuaranteed even with aqueous treatments
Detrim
ental
Ongoing oxidationDue to shellac
--- Significantly reduced
Acidity pH=5,0 pH=7,0Significantly reduced when aqueous tretament is possible
BrittlenessUnsafe
handlingSafe
handlingExcellent improvement
Yellowing A lot Still a lot Insignificant improvement
TRANSPARENCY
Good though limited when lining.
Slightlier opaque
Improvement suggested
Use of Gampi paper instead (more homogeneous appearance, wouldn’t intefer that much on transparency)
![Page 18: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/18.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Characteristics Before After
Innocuous
Transparency Good, though not excellent when lining.
Intense colour tone
OK
ScaleGuaranteed even with aqueous treatments
Detrim
ental
Ongoing oxidationDue to shellac
--- Significantly reduced
Acidity pH=5,0 pH=7,0Significantly reduced when aqueous tretament is possible
BrittlenessUnsafe
handlingSafe
handlingExcellent improvement
Yellowing A lot Still a lot Insignificant improvement
![Page 19: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/19.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Characteristics Before After
Innocuous
Transparency Good, though not excellent when lining.
Intense colour tone
OK
ScaleGuaranteed even with aqueous treatments
Detrim
ental
Ongoing oxidationDue to shellac
--- Significantly reduced
Acidity pH=5,0 pH=7,0Significantly reduced when aqueous tretament is possible
BrittlenessUnsafe
handlingSafe
handlingExcellent improvement
Yellowing A lot Still a lot Insignificant improvement
![Page 20: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/20.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Characteristics Before After
Innocuous
Transparency Not bad, though not excellent when lining.
Intense colour tone
OK
ScaleGuaranteed even with aqueous treatments
Detrim
ental
Ongoing oxidationDue to shellac
--- Significantly reduced
Acidity pH=5,0 pH=7,0Significantly reduced when aqueous tretament is possible
BrittlenessUnsafe
handlingSafe
handlingExcellent improvement
Yellowing A lot Still a lot Insignificant improvement
![Page 21: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/21.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Characteristics Before After
Innocuous
Transparency Not bad, though not excellent when lining.
Intense colour tone
OK
ScaleGuaranteed even with aqueous treatments
Detrim
ental
Ongoing oxidationDue to shellac
--- Significantly reduced
Acidity pH = 5,0 pH = 7,0Significantly reduced when aqueous tretament is possible
BrittlenessUnsafe
handlingSafe
handlingExcellent improvement
Yellowing A lot Still a lot Insignificant improvement
![Page 22: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/22.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Characteristics Before After
Innocuous
Transparency Good, though not excellent when lining.
Intense colour tone
OK
ScaleGuaranteed even with aqueous treatments
Detrim
ental
Ongoing oxidationDue to shellac
--- Significantly reduced
Acidity pH = 5,0 pH = 7,0Significantly reduced when aqueous tretament is possible
BrittlenessUnsafe
handlingSafe
handlingExcellent improvement
Yellowing A lot Still a lot Insignificant improvement
![Page 23: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/23.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Characteristics Before After
Innocuous
Transparency Good, though not excellent when lining.
Intense colour tone
OK
ScaleGuaranteed even with aqueous treatments
Detrim
ental
Ongoing oxidationDue to shellac
--- Significantly reduced
Acidity pH = 5,0 pH = 7,0Significantly reduced when aqueous tretament is possible
BrittlenessUnsafe
handlingSafe
handlingExcellent improvement
Yellowing A lot Still a lot Insignificant improvement
Diminishing yellowing depends on varnish remnants and oxidation degree
![Page 24: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/24.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Other aspects
Applicability Presence of stamps, scotch tape, techniques (ink, watercolur, graphite), papers (diferent thicks…).
Reversibility
Toxicity
Ethanol bath
Ethanol + Toluene bath
![Page 25: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/25.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
![Page 26: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/26.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
![Page 27: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/27.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
![Page 28: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/28.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
![Page 29: impregnated paper.pps](https://reader036.vdocument.in/reader036/viewer/2022081420/55cf940c550346f57b9f43d5/html5/thumbnails/29.jpg)
Replacing varnishes on architectural drawings on impregnated paper www.ritaudina.com
Contact details:
Rita [email protected]
Further information soon at my blog:http://ritaudina.com(subscribe by email)
Thank you!