View allAll Photos Tagged shellac
This was my first try at an image transfer. I still want to add something to the black box, but I'm not sure what yet. This was done during a Patricia Baldwin Seggebruch workshop. It is 6" by 6".
Shellac, Button Factory, Dublin 28.4.22 photos copyright Fergus Kelly DO NOT use without permission.
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Some of the main uses of shellac in different fields are :-
Surface coating – As under coat, primer, sealer French, Polish, Leather dressing, Fruit Coating etc.
Printing – Flexographic ink, Waterproof ink, Photo engraving.
Textiles – Stiffening of hats.
Cosmetic & Pharmaceuticals – Hair lacquer, coating for Enteric pills, Dental base place.
Engineering – Grinding wheels, Rivet & Plaste sealer.
Electrical – Micanite, Insulating Varnish.
蟲膠
是一種天然無毒的動物膠，
昆蟲的分泌物，
常用在醫藥膠囊、點心食品、
還有木工塗料中。
在塑膠發明前，連唱片、鋼筆都要用到它。
耐溫只能到攝氏80度，如果超過了可能會融化。
以比例蟲膠1、酒精4混和，等蟲膠完全溶解進去即可，
若蟲膠放置過久，有可能較難溶解，就不能使用了。
另外，由於蟲膠會跟酒精產生化學作用，
調製好的蟲膠漆建議在三個月內使用完畢，
超過時間後，塗布上去後會久久無法乾燥。
膠蟲在1910-1945年間，
與桑蠶、蜜蜂並列為是世界三大養殖資源昆蟲。
當時的蟲膠產量曾有年產32100噸記錄，
其中以印度第一，約佔9成，泰國次之，中國第三。
台灣在日據時代，日人1912年起自印度、泰國引入飼養均告失敗，1940年日本政府再派員自泰國分批空運來台，卒獲成功引入。
在1945年以前，蟲膠是很重要的產業。
蟲膠可以用來製造染料、食用色素、胭脂、口紅化粧品，
工業上作塗漆、電器絕緣體、防銹劑、防潮劑、黏著劑、助滑劑等多種用途。
像台灣早期的洋乾漆黑膠唱片就是用蟲膠為原料做成的。