The boards been really active today.I have enjoyed reading everything.
I received a sample pack of all types of leaf free from a Chinese manufacture.I need to do a water gilded glass sample for a client so I used some of the 23k loose leaf.After laying 2 layers and letting it dry I turned it over to find small flecks of silver in the gold.
I wanted to make everybody aware of this.It's not a bad deal price wise but I don't think it's worth the worry.
Roderick
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This is an interactive Bulletin Board on the topics of Sign making, design, fabrication, History, old Books and of coarse Letterheads, Keepers of the craft. The Hand Lettering Forum features links to resources, sign art history, techniques, and artists profiles. Learn more about Letterheads at https://theletterheads.com. Below you'll see Mchat has been added as a live communication portal for trial, and the Main forum Links are listed below.
This is an interactive Bulletin Board on the topics of Sign making, design, fabrication, History, old Books and of coarse Letterheads, Keepers of the craft. The Hand Lettering Forum features links to resources, sign art history, techniques, and artists profiles. Learn more about Letterheads at https://theletterheads.com. Below you'll see Mchat has been added as a live communication portal for trial, and the Main forum Links are listed below.
Chinese Gold Leaf
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Robare: Just adding lead to the current formulae would upset the balance of the current components. While a small amount of lead solution could act as an additional dryer, it could actually counteract the drying capability of the synthetic agents. Many components have changed to compensate for the lead-free formulations so no, one would have to start over.
By the way, the real issue of lead free is not so much the formula additives but the lead based pigments (hard leads which are not ingestably toxic, olny in dust form ie lung dust issues). The most light-fast pigments were Chromium Lead Oxides giving us durable yellows, oranges and greens; Red Lead Oxide giving us deep reds; soft Lead Cobalts giving us blues and purples; and White Lead/Zink compounds giving us pure whites.
RT: Lead foil which was used in the 20's like aluminum foil, was used sometimes as a backer for pearl. It appears galena blue through glass.
By the way, the real issue of lead free is not so much the formula additives but the lead based pigments (hard leads which are not ingestably toxic, olny in dust form ie lung dust issues). The most light-fast pigments were Chromium Lead Oxides giving us durable yellows, oranges and greens; Red Lead Oxide giving us deep reds; soft Lead Cobalts giving us blues and purples; and White Lead/Zink compounds giving us pure whites.
RT: Lead foil which was used in the 20's like aluminum foil, was used sometimes as a backer for pearl. It appears galena blue through glass.