Is ox gall vegan? A complete guide to cruelty-free art supplies
                                
                                
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                                    4 min read                                
                            
                                Ox gall is a greenish-brown liquid mixture derived from the gallbladders of cattle and is definitely not vegan. This traditional wetting agent, used for centuries to improve the flow of watercolors, is a significant concern for vegan artists who want to ensure their materials are cruelty-free.