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Herein, how long do you leave etching cream on glass?
For a more pronounced etching, use your brush to move the cream on top of your stencil. At about the 1 ½ minute and 3 ½ minute marks, do this to break up air pockets that will cause uneven etching. Leave the cream for five minutes. Overall, including stirring, the cream needs to stay on the glass at least five minutes.
Also, can you remove etching from glass?
To remove the film, simply soak your glasses in undiluted white vinegar for 15 minutes, rinse them off and let them dry. While filming deposits residue on the surface of the glass, etching pits and damages the surface. There is no way to fix an etched glass or remove the etching. Once the damage occurs, it's permanent.
If you do not leave the Etch Cream on long enough, the cream will not have enough time to react with the glass. Too long can leave scorch marks on the glass or weaken the stencil. For Over N Over stencils, Peel N Etch stencils and hand cut vinyl stencils- 5 minutes max.