The information in this document applies to:
MathType 3.x (Mac and Windows)
MathType 4.0 (Windows)
MathType 5.0 (Windows)
QuarkXPress (Mac & Win)
EPS files created by MathType 3.x appear on all layers, rather than just the
black layer. Other users may have trouble using background colors with MathType
QuarkXPress depends on EPS images to have color information within them in
order to do correct color separations. Because MathType 3.x and earlier did not
support color, when QuarkXPress does color separations, the EPS equations
created using those versions of MathType end up using whatever
color the current PostScript pen is set to. The result is that QuarkXPress does
not filter the equations out of any
layers, and MathType EPS files end up printing in all separation layers.
MathType 4.0 and 5.0 for Windows have color support for both RGB and CMYK models, and
if you define black using the CMYK model, it will print only on the black layer.
This article addresses the following topics:
1. Forcing MathType 3.x to print only on the black layers
2. Using the CMYK model in EPS files in MathType 4.0 and
3. Trapping and punching out
Forcing MathType 3.x to print only on the black layer
MathType 3.x incorporates an option which will cause MathType to
write EPS files which print only on the black layer. To invoke this capability:
- Quit MathType.
- If you are using Windows, launch NotePad, the text editor included with
Windows, and open
MathType.ini, which is located in the
- If you are using a Mac, launch SimpleText, the text editor included with
Mac OS and open the
MathType Preferences file in the
Preferences folder in your System Folder.
Find the section labeled
[General], and enter the line,
cause MathType to insert the PostScript command
0 setgray into
EPS files, which will make QuarkXPress place MathType equations only in the black
- Save this file, and quit your text editor.
Any new EPS files will now only print on the black layer. Any older EPS files
will need to be reopened by MathType and resaved.
Using the CMYK model in EPS files in MathType 4.0 and 5.0 for
For the majority of MathType users, their interest will be to define Black
according to the CMYK model, for which instructions are provided here.
- Launch MathType.
- Under the Format menu, choose Color and then Edit Color Menu… to open
the Edit Color Menu dialog.
- Click on Black to select it.
- Click the Edit button to open the Edit Color dialog.
- Under Model, change it from RGB to CMYK.
- Click OK to close the Edit Color dialog.
- Click OK to close the Edit Color Menu dialog.
To define other colors using the CMYK model, you can either edit existing
colors or create new ones. To make the color that you have chosen your default
color in MathType, click the Make Default button. Please note that if you are
creating EPS files with multicolored equations, you should make sure that all
the colors that you use in equations are defined using the CMYK model.
Trapping and punching out
This section only applies to you if you want a background color behind the
equation. The normal way to treat black text is not to have it punch out of the
background color, but to have it overprint instead. But since MathType does not
contain color information, Quark does not realize that it is in black, so Quark
will punch out any background color. If this is undesirable, you currently have
- Print your color plates separately, and turn off image printing when you
print the plate for the background color. This is done in the print dialog
by setting the OPI option to "omit Tiff and EPS".
- Set the equation background color to "none", and place a
separate graphics frame over top of it with your background color. With this
new graphics frame selected, choose "Show Trap Information" from
the View menu. Now set Background trapping to "Overprint", and
print color separations as you would normally.