Does random location of security Strip give varieties.
Post by Kavan Ratnatunga (12165-R) on 2022 Aug 15 11:41
On Sri Lanka BankNotes printed by DeLaRue the 2 or 2.5 mm Starchrome
strip can vary randomly in location over about 10 mm both horizontally
and vertically as well as the letters visible on the strip.
I assume this fluctuation of Strip location is common in Banknotes of
other Nations.
I was amused to find horizontal fluctuations in the location of the
Starchrome strip over range of 7 mm in steps of 0.5 mm on the higher
denominations of modern Sri Lanka banknotes being cataloged on
Colnect as different varieties of the banknote.
I know a collector is free to collect anything including fancy serial
numbers to increase the rarity of the Banknote.
Probably by some dealer who wants to increase sales.
In my opinion, they don't represent variations of the note.
I would like to know others' opinions on this.
Is there any IBNS opinion on it?
According to Owen Linzmayer(IBNS 7962-R)
Note printers intentionally shift the location of security threads
back and forth several millimeters during production to prevent the
the threads from being in a stack, which would cause straps of notes
to bulge noticeably due to the extra thickness.
So minor variations in the location of a security thread should not be
considered a new variety, in my opinion.
However, there have been cases where windowed threads appear on left and then switch to right, or on front, and then shift to back. These are intentional and substantial changes that do warrant a new variety.
According to Julian Albericci (7536-R)
The position of security threads in the substrate is determined
largely by the width of the feed reel from which the thread is
introduced into the paper and the distance the reel is mounted from
the point of introduction to the substrate during it's manufacture.
Generally embedded threads are introduced at the time during the
substrate (eg paper) is formed from the uniting of two layers, (front
and back) as part of the paper rolling process.
If all the threads were to be positioned in the same vertical
alignment then the final note pack would have a distinct bulge where
the thread is positioned causing issues in the cash management
processes. On a new pack of notes with a security thread if you look
edge on you will see a zig-zag pattern formed by the misalignment of
the thread.
I would not consider the small variation in thread position to be a
change in variety.
However, if an upgrade in security, a new type of security thread, or a major shift in the thread position, even without any other outward changes to the design, that would represent a new variety.