Bartovation Diffraction Grating Sheet 13,500 Lines/in [One 6" x 5ft Roll]

Seems to be the best I’ve seen. I wasted money on others and this one is the real deal. You can tell it was made with high precision equipment.

Love it! Works as it should!

I bought this for physics experiments. It works pretty well BUT when I used diffraction with laser pointers to calculate wavelength, the values were off. It seems the spacing is closer to 9545 lines/inch (~200lines/mm) rather than 13,500 lines/inch (~350lines/mm). If using with students you can have them calculate d given a specific wavelength instead of visa versa. My research leads me to believe this grating doesn't actually use lines, but rather 5 micron spaced apertures, but I might be wrong. I verified with red and green lasers that a d value of 5e-6m is about right.

I bought this to make my own holographic inlays for my resin projects absolutely love it!

The media could not be loaded. The product is great, just have to use the correct side for chocolate I'm order for it to work. Helpful hint. The side you want to touch the chocolate when it's cooling is the brighter more colorful side. Don't rely on the squeeze test as this film is VERY delicate. I advise wearing gloves when handling the film. Your finger prints will imprint into the film and will transfer onto the chocolates. Also the holo effect on the bottom is very heat sensitive so your hands will destry the effect, keep that in mind when displaying the effect on the chocolate. Other than those things to look out for the film is GREAT!!! WIll be purchasing again soon and frequently

The media could not be loaded. I wasn’t sure how well this was going to perform, but blew all my expectations out of the water. Bought a roll to cut into multiple sheets and so far it’s done everything I hoped it would.

Placed this on my living room window and it’s wonderful when the sun hits it.

I bought this three times so far and the rainbows I get go from wall to wall. I am going to purchase for all my sunny windows. ONLY one complaint-the last 2 rolls were flattened out right in the tube. The tube not damaged.