Hi Philippe,

This very much depends upon the quality of the blades you are using, if you are using the correct blade for the board and the abrasiveness of the passe-partout.  As a guide for good quality work I would suggest 5 – 8 from one blade tip dependant upon the size of the passe-partout.  However, with a little experience you should be able to feel when the blade starts to get dull and change it accordingly.

I have come across a number of framers who change the blade every passe-partout on the basis that the cost of the blade is negligible compared to the cost of a passe-partout not being right.

Yes you are, but also check you are using the best blade for your passe-partout type.  For example if it is conservation quality it is likely to be quite hard and be better with a TECH S 012 blade.  If you would like to learn more about blades there is information in the instruction manual.  Please let us know if we can be any further help.

Yes you are, but also check you are using the best blade for your passe-partout type.  For example if it is conservation quality it is likely to be quite hard and be better with a TECH S 012 blade.  If you would like to learn more about blades there is information in the instruction manual.  Please let us know if we can be any further help.