NO for StickerBooks/Mini Labels and Round Stickers/Labels. The sleek glossy finish means that ink won’t stick.
YES for Rectangular Stickers/Labels. We recommend you only use ballpoint pens and permanent markers if you plan to write on your labels. If you use anything else, like gel or rollerball pens, fountain pens, or rubber stamps, the ink may not be absorbed by the sticker/label and may smudge. For best results, please allow the ink to dry for a few minutes before you touch the surface of the sticker/label. That gives the label a chance to absorb the ink.