Can this Epson 4 x 6 Inch Premium Gloss Photo Paper be used in non-Epson printers?
Yes, generally any photo paper can be used in any printer. HOWEVER, the quality of the results may vary. Most photo papers are designed to work the best with the same brand of printer and printer ink. The paper is formulated to be compatible with their particular inks offered in the same brand of printer cartridges. So you can use the paper in other printers, but you might not get the same quality of results in other printers when using Epson paper as you would from an Epson printer. Buy one small package of the Epson paper, and test it on your non-epson printer, is all I can recommend here, then you will know before investing in a larger package. You might be perfectly happy with the results.