By continuing to use this site, you agree to our use of cookies. Find out more

Collecting printing errors

The "doctor blade" variety.

All Topics | Latest Posts

Search for:  in Thread Title in  

Fred Sellars01/03/2021 15:23:47
590 forum posts
257 photos

Amongst the different varieties of printing errors to be found on stamps is the one known as a 'Doctor blade' flaw. These particular errors are not catalogued due to the fact that they are a non-constant flaw that can occur when a fault develops on the blade that removes surplus Ink from the printing cylinder, some of which can be found in sheet margins as a straight coloured line usually of a vertical nature in the same colour as the stamps are printed with, they can vary from a faint thin line to a much broader one.

Although collectable in this condition, preference is given when the flaw affects the printed stamp itself, making them quite unique and possibly valuable,as a printing error of this nature should have been previously removed by the quality control section prior to being dispatched to various post offices.

Here is a good example showing this type of printing flaw, whereby the stamps and the margin have both been affected.


Always worth looking out for ! Fred.

Edited By Fred Sellars on 01/03/2021 15:27:58

Fred Sellars04/03/2021 11:33:10
590 forum posts
257 photos

Sometimes it's difficult to assess the value of a "doctor blade" flaw that affects the stamp due to their irregularity and variations of prominence that can occur, and as a guide to their possible enhanced value one can only assess them against a regular printing error that normally occurs once per sheet, in many cases the regular printing errors are quite minuscule as opposed to the doctor blade errors.

A good example can be seen on the next attachment with some dealers asking around £12 each for a single copy to be found on row 12/5 of every sheet ...........


A "doctor blade" is much more prominent than many of the constant printing flaws to be found, so how does one assess its value ?


All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Stamp Magazine? Use our magazine locator link to find your nearest stockist!

Find Stamp Magazine!


Latest Forum Posts
Support Our Partners
Universal Philatelic Auctions
Nordfrim April
Guernsey post November
Auctioneers Feltzmann
Glasgow Stamp Shop
Purves Philatelics
Tony Lester
varisell stamps
British Stamp Market Values & British Coins Market Values

Subscription Offers

Subscribe to<br />    Stamp Magazine and receive a FREE gift