Enhance Optical Effects with Diffraction Grating Sheet - Linear Lines Review

As a hesitant buyer, I was disappointed with this optics product under "Science Education". Despite the product being tagged as "Industrial and Scientific", it did not uphold its quality. As a result of my tests, I determined that the diffraction gratings were not as sharp as promised. The price point is outrageous for the lackluster product. Save your money and look elsewhere for diffraction gratings.

I thought this product would look like fireworks goggles but it doesn't. It breaks light down into its spectral colors, but it's just a single diffraction line, unlike the many lines found in firework glasses.

I saw other reviews and hoped they were just unlucky. Although the packaging was fine, the foil arrived today in a condition as if it had been smashed with a screwdriver and a hammer. The picture does not quite correspond to the form of this film. Garbage. Do not take any risks. Find someone else to buy. Very disappointing.