Suppose I'm designing something for printing purposes. Then I need to stick with CMYK model. When ever I'm choosing color while designing, I'm setting color based on what my monitor shows me as CMYK. But Monitors don't work on CMYK. So, what my monitor showing is a conversion of that CMYK in RGB. After reading little bit, now I understood that CMYK and RGB are not exactly convertible and there are color always some differences. So, what I'm seeing is not the color I actually set.
Legal-size envelope. Lay the legal paper, printed side up, on a flat surface. Fold the bottom edge of the paper upward, creasing it across, 5 inches from the bottom. Use a ruler to make sure that the crease is exactly 5 inches from the bottom edge. This will leave the top 4 inches of the paper exposed.
For a printable .pdf version of these instructions, click here. You will need Adobe Reader installed on your computer in order to open the .pdf file. You can get Adobe Reader here. 1. Start with a square piece of paper, coloured side up. Fold the top corner of the paper down to the bottom corner. Crease and open again. Then fold the paper in half sideways. 2. Turn the paper over to the white side. Fold the paper in half, crease well and open, and then fold again in the other direction. 3. Using the creases you have made, Bring the top 3 corners of the model down to the bottom corner.