The physical properties, color direction and color difference of stamp ink from gambier (Uncaria gambir roxb) with complexing Al<inf>2</inf>(SO<inf>4</inf>)<inf>3</inf> compound
Publication Name : IOP Conference Series: Materials Science and Engineering
DOI : 10.1088/1757-899X/845/1/012012
Date : 17 June 2020
Type
Conference Proceedin
ISSN
17578981
Volume
845
Page
