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Sunday, 10 December 2017

perforation ...

perforation began as line and ended comb type, with many irregularities. 2 machines were applied sometimes simultaneously.  the first line machine was rebuilt with new pins.  centred copies are almost unknown.  missing pins, blunt or sharp perfs, skewed lines and varied proportions are all known.

perforation is one of the keys to plating.  locating the columns on sheets of 100.

slideshow here

1 comment:

  1. In the 2001 books, I showed five 12.75 PERFORATORS . These I had found by looking at a number of the SHEETS, but I did not get to know which machines were used for the individual presses. This is what I have for Hagemann's "other" values ​​(ie minus 4 and 8 øre), for example by reviewing the scans of the postmuseum's helark on the website. In the next version of Tofdata, found roofing machines will be specified for each PRINT. However, the information will be far from perfect, including because KVIII is almost without characteristics and therefore difficult to detect.

    The studies have shown that KIV and KV were used concurrently to the 12 3/4 roof until mid 1899, to all or almost all pressures, similar to KII and KIII, as they replaced. By mid 1899 the three other machines KVI-KVIII appeared. Immediately it looks like a replacement of two machines with three new ones, but strangely, KIV and KV are still used in certain PRINTS, until the last two-color print in 1905, but in a significantly smaller extent than KVI-KVIII. It seems strange if you have gotten five after having done two machines for many years.

    For brands thanks to 14, we often have the help of the KII tag for determining COLUMN. For KIV-KVIII this is far harder, but sometimes it may be helpful.

    Next version of Tofdata is expected in January.

    Lasse Nielsen