Single colour print file

[Muck959]

Hi.

I'm trying to create some t-shirt images, and I'm hoping someone might be able to help me with something that's been causing me trouble.

I'm making black and white photographic montages. I would like to upload them to a t-shirt print site as a purely black PNG or equivalent so that they might be digitally printed on different coloured shirts. However, I can't seem to find an effective way of removing all of the white from the images. There are always white pixels messing up the pics.

Is there a way of saving out a black separation?

I hope this makes sense.

Andy

[lambiloon]

hi please share image here so we can see what is possible...thanks

[rob day]

However, I can't seem to find an effective way of removing all of the white from the images.

You don't have to worry about the white pixels, when the shirt printer outputs the art work to film only the black pixels will print.

[D.A.R]

Using the Layer Styles dialog you can remove any white pixels by changing the Blend If slider. Drag the white triangles to the left. Any white background will now become transparent.

In order for you to access this dialog the layer can not be a "Background" layer. If it is, click the Padlock Icon to unlock it.

Also there must not be any layers beneath.

Save the file as a PNG 16 and check the box to include transparency.

Note: While the file will have transparency, the Finder or (presumably) Windows Explorer will show the transparency as white.

[rob day]

The OP is printing the art, white pixels do not print unless they are explicitly set up as a Spot Channel separation, which isn't possible when saving as .PNG.

InDesign has the option of changing the default [Paper] swatch to a color for previewing purposes, but the [Paper] color still doesn't print. Shirt printers usually output to film positives which are used for exposing the screens.

[D.A.R]

https://forums.adobe.com/people/rob+day  wrote

The OP is printing the art, white pixels do not print unless they are explicitly set up as a Spot Channel separation, which isn't possible when saving as .PNG.

True