Yes,You will have to do some testing.Because backpacks have a varitey of materials in them some can be dried the conventional way.I usually add catalyst to my ink to make the print more durable.
And multi-colors are a little riskier.
thanks for suggestions.Right now i have to take care of my shirts,but I'm thinking about backpacks too.
Are other method than screenprinting better for backpacks? I don't screenprint by myself -have to pay for it
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