>>17774406>still don't really understand why Ame's flour mixture thing is better than just using like... actual glue?Oh! I actually know that one.
Wheat paste adheres better to paper and random surfaces. Glue tends to be very much designed for plastic and wood.
Professional advert posters on billboards and cement are using (refined) wheat-based glue as well since it combines rather than simply adheres to the paper and deeply gets into the structure of the material.
Also it's INCREDIBLY cheap.
Life protip: If you don't want your posters to get torn down, lightly score them with a razor blade in various random directions. That will make the poster disintegrate if someone seeks to mess with it and make it impossible to remove without some sort of steam gun.Extremists also put glass dust on the back that injures fingers and lungs, but that's terrorism. 