HI,

I have just finished building a largish 1000m x 1000mm laser engraver but am finding it difficult to source a protective screen at this size that doesn't cost an absolute fortune. Does anyone here know of a sheet material that can be used to block 445nm( or a range including this wavelength) indirect laser light at an affordable price. I got quoted £120 for an A4 sheet last week which was a bit shocking, although they do supply the medical industry so probably on the high end of price range.

I need visible access to the entire cutting bed so don't want to have a small window in the middle which rules out using cheaper materials for the hood surround.

thanks in advance. Hope someone can help.

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