Blockout pens are great for fixing small pin holes in your emulsion after exposure or even during the printing process. Don't worry about tap or block out solutions, simply apply with this pen and the pin hole goes away! To ensure complete coverage, the block out solution in these pens has a fairly high viscosity. They need to be shaken well before use and may have to be squeezed hard to get the block out fluid moving smoothly. A blockout pen for screen printing is great to use in preparing a screen for press.
Using a blockout pen allows you to easily block out small pin holes or registration marks left in the emulsion.
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