Good Quality Buttons but...

I was excited to finally order some buttons and when I received the proof everything looked great! However when the buttons actually came the thin white lines I had in my artwork came out more grey since the black background kind of creeped in. They didn't look as sharp as I expected from the proof. This may be my fault and I probably could have adjusted the artwork to have them look okay but from the proof I thought they would look great. The quality of the buttons are great but was disappointed by the print quality. Would probably order these buttons again but would avoid too thin of lines in the artwork.