White blobs appear in background on print but not in PS, AI, or any preview (PNG, etc).

Forum|Forum|1 year ago
July 3, 2024
3 replies
193 views

Hi everyone,

I have a t-shirt design in Photoshop with a transparent background. But when I send it to the printing company they respond by saying there are marks in the background (attached). Thing is, everything on my end seems fine. I've exported in every method I can think of, and even brought the file into Illustrator, every preview or file has a transparent background (PNG, SVG, AI). I've even gone through my design layer by layer and nothing appears.

Is there something I'm missing? Any help would be really appreciated. Thanks.

macOS

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defaultktmkkuj5zfdpAuthor

Participant

Hi guys, firstly, many thanks for taking the time to help - I really appreciate it. I've had no luck figuring out what the problem is. I've tried the methods suggested but the only thing which appears strange is the eyedropper tool returns a colour value to the area in question - any idea about how to figure out where that's coming from? There are no layers associated with the colour to my knowledge (apologies for the novice questions!).

Conrad_C

Community Expert

When you check transparency, check for pixels that are almost, but not quite, 100% transparent. For example, in the areas where the white blobs appear, open the file and see if the Color Sampler tool (eyedropper) reports anything other than complete transparency. They may need to be made completely transparent. Another way to check for that is using the Threshold adjustment or adjustment layer.

Still another neat trick someone else here has used to find hard-to-see non-transparent pixels is to temporarily apply the Stroke layer effect, which will display a line around any non-transparent pixel regions.