Adding 2-color Gradient to black & white Halftone image
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Adding 2-color Gradient to black & white Halftone image
Adding 2-color Gradient to black & white Halftone image
I converted a black & white photo into a halftone .jpg, and would like to screen print the image, but with a light to dark blue Gradient instead of b&w. I'm wondering how I can add the gradient to the .jpg in either Photoshop or Illustrator before sending it to my printer?
Whenever I use the gradient tool in either program, it keeps adding the Gradient on top of the .jpg, instead of blending the original black & white image with the new blue colors. It's basically treating my .jpg as a flattened image.
I've included a link for the effect I'm going for, except I just need a two color Gradient:
Re: Adding 2-color Gradient to black & white Halftone image
The trick is under the image menu, "apply image".
Make a layer where the image is one color (red). In another layer make a gradient from black to white. Apply Image where the gradient is the source channel and use the blending option of add.
Make another channel in the second color. Rotate the gradient 180 degrees and apply the gradient image to the second color image.
Re: Adding 2-color Gradient to black & white Halftone image
Thanks for the quick reply Fred...I'm still a newbie with Gradients, so I have a couple of follow-up questions. Hopefully you're a patient man.
Quote:
The trick is under the image menu, "apply image".
Quote:
Make a layer where the image is one color (red).
How do I change the color of a grayscale halftone image? I'm assuming I need to change the color mode to RGB and create a duplicate layer of the image, but then how do I change the image color? Unless you're talking about creating a fill layer the color red?
Quote:
In another layer make a gradient from black to white.
Make a gradient by creating a new layer and using the Gradient Overlay tool or the Gradient Tool on the toolbar?
Quote:
Apply Image where the gradient is the source channel and use the blending option of add.
When I go to Apply Image...the Source is the "name of the file", but I'm not sure what Layer to select? I then selected RGB for the Channel. In Blending I selected "Add", Opacity 100%, with Scale 1, Offset 0 and left Preserve Transparency and Mask unchecked.
I'll stop here for now until I can figure out these steps...
Last edited by rockwell; January 23rd, 2008 at 08:41 PM.
Re: Adding 2-color Gradient to black & white Halftone image
The exact steps would depend on if you are setting up a screen printing job or using DTG. With screen printing, you would define a channel for each of the spot colors. With DTG, you would be using layers. The color of the shirt and and type of ink might also need to be factored in.
Screen printing 2 gradient screens using opaque inks has issues which might need to be considered.
Re: Adding 2-color Gradient to black & white Halftone image
Quote:
Originally Posted by ImageIt
The exact steps would depend on if you are setting up a screen printing job or using DTG. With screen printing, you would define a channel for each of the spot colors. With DTG, you would be using layers. The color of the shirt and and type of ink might also need to be factored in.
Screen printing 2 gradient screens using opaque inks has issues which might need to be considered.
Screen print or DTG?
The 2 color gradient will be screen printed.
Ok, so I just learned how to apply a gradient in Photoshop:
1. Open image...Create Duplicate Layer
2. Magic Wand...Inverse to select image
3. Select...Save Selection
4. Select Gradient Tool...Change Opacity before applying Gradient
5. Apply Gradient
NOW the big question is...since the gradient and the image are on the same layer, will my screen printer be able to use my file, IF I'm even creating the gradient the right way?
I'm pretty sure this gradient method is not correct for screen printing since the dots in the gradient are too small to be seen, and therefor are too small for a screen. Rhymes...yeah!
Re: Adding 2-color Gradient to black & white Halftone image
Quote:
Originally Posted by rockwell
1. Open image...Create Duplicate Layer
NOW the big question is...since the gradient and the image are on the same layer, will my screen printer be able to use my file, IF I'm even creating the gradient the right way?
For screen printing, you want to be making spot color channels, not layers.
Spot color channels edit similar to a grayscale layer, but preview in the ink color selected for the spot color.
This is a discussion about Adding 2-color Gradient to black & white Halftone image that was posted in the Graphics and Design Help section of the forums.
Adding 2-color Gradient to black & white Halftone image 
