Make Precise Folds by Carving

The paper models I have published require precision. Carving (or Scratching?) eases to make perfect folds.
A summary is shown in the image.

• A cutter
• Crease Pattern
• Blank sheet of paper
• Transparent surface (eg. glass table)
• Light source (eg. desk lamp)
• Adhesive tape

Put the blank sheet of paper + CP (back) side by side and stick them horizontally or vertically along the edges with two pieces adhesive tape to avoid shifting. Then order the sheets on top of each other. A lamp and a transparent surface illuminates through the papers so you can easily track the lines. 

Use the back of the cutterblade and carve the sheet of paper with light pressure.
The result should look like in the second picture.

Therefore precise folds should be no problem.