What's your print or web design related tip that you've learned at school, and are still using today?
Here are my 2 basic print tips
This one is really pretty basic, so if you are a little bit into print design, you should be familiar with the term bleeding. In every design that goes to the printer, you have to make sure there is enough bleeding. I always stick to at least 3 mm of bleeding. It's what I learned at school, and as far as I'm aware it's still being commonly used. Could be that some printers have another specific number, but as far as I can remember I never used another number. Sometimes you get a detailed specification from the printer on the placement (offset) and thickness of the crop marks as well. It's one of the rules to keep in mind with each design that goes to the printer.
Another important item to keep in mind is that black is always set to overprint. Overprint means, it will be printed on top of the other colors instead of having it separated with the colors underneath. Having (100%) black in overprint will avoid possible small mismatches as shown in the simplified image below. On the left I have reproduced such mismatch, though, with a certain amount of exaggeration, just for demo purpose. On the right, the black part will be printed on top of the cyan, magenta and yellow colors that make up these 2 circles. Because 100% black will cover the other colors, it is possible to do that. However, this is not the case if you use only a percentage of black, unless if explicitly made it so. In Illustrator (or InDesign) you can select an object and have it set in overprint fill or stroke. For instance if you have a red filling and a black stroke, you can set the stroke in overprint.
In both Illustrator and InDesign, the overprint option is located in the Attribute panel (Window > Output > Attributes). However, when exporting your Illustrator or InDesign file to a PDF, all elements where 100% black is used will automatically by default be set to overprint. In Acrobat Professional, you can always check the overprint and color separations. Go to Advanced > Print Production > Output Preview… There you'll see Color Separations where you can check each color separation. When you select Color Warnings, you can check the 'Show Overprinting' option. There you'll see that all elements that use 100% black will change into the color that is set to that option (see image below).
Any web or print related tips you want to share?
Now that I shared 2 of my basic print design tips, are there any valuable tips you've learned during school that you want to share with us? You are welcome to share any print design or web design related tips as well. If the sum of the tips is so great, I'll put them in a separate post for future (easy) reference