Help expand the library! This site is mostly powered by filament donations, either from manufacturers directly or fellow hobbyists. This isn't my job (though I do have a lot of fun with it) so I can't afford to bring you all the filaments on the face of the earth... but you can help with that!
If you have a filament that I don't, I want to make it easy for you to get that filament to me so that we can get it in the library. Here's the important part before we get to the details:
You can use something else to hold the filament if you'd like; the important part is that the labels you print out in the next part stay with the proper coils. Little baggies are tried and tested, so that's what I recommend.
Start by printing out this page. Print and cut out as many of the little cards as you need; one for each sample, please. Cut a 1-2 meter length from each filament, fill out one of the cards, and drop it inside a sandwich bag. Don't worry about writing your name on each card -- as long as at least one card has the information then it will be fine. I'll use this to credit you on the site, so write whatever you'd like to appear; a screen name, first name + last initial, full name; whatever you're comfortable with.
I can take almost any kind of filament that isn't a super-high-temp exotic:
At the moment, I can only accept 1.75mm filament. If you have 3mm filament and a 3mm printer, please get in touch. If whatever types / sizes you have aren't among those listed, ping me on Twitter here to make sure that I can print it.
Most flat-rate packaging (or whatever is designed for small, mostly flat things) will work for shipping filament. If you're in the US, the USPS has Priority Mail Flat-Rate padded envelopes that work well. Stick your filament bags in there and address it as follows:
If you can, please let me know that you're planning to send things my way. It helps in both the planning department (watching out for packages) and also allows me to confirm that whatever samples you have aren't already in the pipeline so that we don't accidentally get duplicates. Send me a message on Twitter here: @filamentcolors.
Drop your package in the mail (hopefully after letting me know that it's coming) and I'll get your filaments indexed as soon as I can. Because this is a hobby, the current queue is roughly a month or two... but they will get added! Feel free to follow up and make sure that I've received them.
Thank you so much for considering donating to the library. The more colors we add, the more useful this site is to everyone. Most of the colors I have are only easily available in the U.S., so I definitely want to hear from you if you live elsewhere!
Cheers and happy printing!