Tech Order 13-1-10 Oct 43. “Refinishing Sheep Shearling Type Clothing”

[Micawber]

 

[Dumpster D]

Ahh Acetone, my old friend.

 

[flyincowboy]

Oops!!! Now i understand why all the wartime B3 are so fragile!! if not nourished the leather will become dry and stiif as cardboard!!!ACETONE act as a degreaser and get rid of the fat and oils used during the tanning process! The finish lacquer seal the top of the skin by waterproofing the leather which continue to dry for years !

 

[Dumpster D]

I can't get over the illustration. Here's a few gallons of Acetone and a rag, have at it.

More concerned about the flammability than your personal health.

Just crack a window and let a nice breeze flow through la dee da, don't even need a respirator or anything.

"Sir The fumes are making me dizzy"

"Yeah they'll do that"

 

[Micawber]

Health & Safety and potential short and long term effects was not really that much of a consideration back then.

 

[B-Man2]

I can't get over the illustration. Here's a few gallons of Acetone and a rag, have at it.

More concerned about the flammability than your personal health.

Just crack a window and let a nice breeze flow through la dee da, don't even need a respirator or anything.

"Sir The fumes are making me dizzy"

"Yeah they'll do that"


View attachment 137661

Totally understand and agree with you. Unfortunately times being what they were, no one knew or considered the long term effects of anything back in those days. Smoking being a classic example. And even if they did know about it, I’m sure there were some that would disregard the warnings …. Again … looking at people today …. Smoking being the example.

 

[John Lever]

No description of Top Finish Lacquer. Do we assume cellulose ?

 

[denny@aero]

I'm intrigued by the "sawdust method" for cleaning ?

 

[Skyhawk]

I'm intrigued by the "sawdust method" for cleaning ?

Me too!
A quick google search brought this up:
https://woodste.com/en/services/sawdust-for-fur-cleaning/

 

[Skyhawk]

I saw this on a Fur Forum. Makes sense:


"Cornmeal,or cobgrit or hardwood sawdust is used in conjunction with mineral spirits and a little water to clean fur.
The mineral spirits dissolves excess tanning oils left in the fur and the media will take it up.Then shake out the media.
There is no way to soften coarse fur.If a pelt is from a heavy section and has full underfur certain species can have the coarser guardhairs plucked out leaving the soft plush underfur."

 

[Micawber]

No description of Top Finish Lacquer. Do we assume cellulose ?

Methinks more of an acrylic lacquer.

 

[John Lever]

I don't think sprayable water based lacquenr existed 80 years ago. From my experience acrylic lacquer came around in the 1980's at the same time as water based car paints. Acrylic doesn't flow out like cellulose and is usually white prior to drying

 

[Dany McDonald]

I to wonder what that sealer was.Thing is I don't think you can put cellulose lacquer over an acrylic base (Poly-acrylate). And cellulose lacquer tends to yellow a lot and be on the brittle side so it would crack.

 

[John Lever]

I doubt long term durability was a consideration

 

[Micawber]

I don't think sprayeble water based lacquenr existed 80 years ago. From my experience acrylic lacquer came around in the 1980's at the same time as water based car paints. Acrylic doesn't flow out like cellulose and is usually white prior to drying

Yes you are right there John. The specified poly-acrylate dye was water soluble.

What Dany says is correct, it would only require a thin coat of cellulose. As an aside, oil based finishes over cellulose is generally safe but not the other way round.

 

[Dany McDonald]

I know and agree, but do we see excessive yellowing on originals today, I don't own any so can't comment or add on that.

And the sealer could start cracking right after its cured. So the effectiveness of the process could be questioned if cellulose was used.

 

[Micawber]

I know and agree, but do we see excessive yellowing on originals today, I don't own any so can't comment or add on that.

And the sealer could start cracking right after its cured. So the effectiveness of the process could be questioned if cellulose was used.

Agreed. Poly-acrylate dye so perhaps poly-acrylate or similar sealer / finish.

Varnishes and Surface Coatings: The History of Synthetic Resin Varnishes

www.conservation-wiki.com

 

[Dany McDonald]

Agreed. Poly-acrylate dye so perhaps poly-acrylate or similar sealer / finish.

Thank for that piece of info Steve, interesting. I am trying to track the earliest usage of a sprayable synthetic varnish, before the early 50's...

We know that a cellulose varnish was used in the early 1900 up to now, to proof the textile wrap on the wings of airplanes.

If you read the first paragraph, the problems were not to be address for short-term usage, or at least for the duration of war, and I expect, even after. So a proper varnish or sealer must have been planned to meet the expectation of the directive.

We need to track what's behind: stock number 7300- 538270

D

 

[Dany McDonald]

Found it....

It could be cellulose, the Class number is 07 for the sequence 7300
Looking for the Eaton Clark lacquer...