Diffraction Grating sheet 13,500 lines/inch - Double Axis 1Ft x 6 Inches

LOVE this stuff. The rainbows are so much fun. My nieces and nephews love playing in them. I have not been able to get them to stay on the window without taping them but double sided clear tape works well. I also love the privacy factor with them as they do muffle the view.

This was a waste of money. This was a wrinkled piece of cheap plastic that can not be used as intended. This is going out like all garbage is supposed to

Perfect! I love how durable it is. I was afraid that it'd be to fragile for crafting with, but it works like a dream!

I plan to use this for making decorative candy. I have not yet used it. It does, however, appear to be the right material.This is closer to 5x10 than six inches by twelve. If you need that exact area, this won't work. It's also a lot thinner than I expected, more like a mid-weight cellophane than a sheet of plastic. I expected something more like the pages you use for overhead projectors, though nothing in the description suggested that.Others have complained about crinkling or creases. Mine came perfectly flat. It was packaged in a heavy, flat plastic bag, then inside a padded Amazon envelope. (Frankly, the plastic baggie is thicker material than the product.) They may have gotten better about the packing and shipping or I may have gotten lucky, I don't know.All in all, you can probably do better for this amount of money.

I am tired of sellers selling junk. Read the reviews, listen to the 1 stars.1) packaging was perfect, but the film was full of wrinkles and tiny dot holes.2) this stuff didn't workI wad excited to make fancy chocolate for a birthday cake. Instead, I have to reheat the chocolate and just do something else. Wasted hours.

Good Quality at Good Price. Packed well and arrived without creases or blemishes.

The diffraction grating works well and has sharp diffracted spots on two axes. I can't attest to the line count accuracy.The main issue is inadequate packaging. It is sandwiched between two sheets of very cheep copier paper (much less than 20#) (It needs at least a sheet of cardboard or two.) This is placed within a flimsy bubble wrap-lined mailer. As a result, it arrived with creases, and kinks. Also, the cut edges are jagged and look hand cut - as if with grammar school safety scissors. Finally, the substrate material is very, very thin (< 0.002") like cellophane for an Easter basket. It is also very static electricity prone picking up lots of dust - this can be cleaned.For the price, I'm OK with it - one can find regions without creases and kinks if you don't plan to use the whole sheet in one application.

great product