Common Plate Varieties On Modern Canadian Stamps.

broken/open window is just above the 6 of 1976. See it on jeanlafontaine web link I provided earlier, go to pp 6 of 13, last intem

I knew where and what to look for but it is so very minor that it hardly
even deserves to be called a variety.

Inconstant varieties, Darnell states are those that occur in a limited and/or irregular way, positioned in the same place but not appearing on all sheets.

Darnell lists a few pages of these inconstant varieties, Unitrade does not list them at all.

Most of the ones I found are what I call donuts.

In the offset/litho printing process they are usually created when a bit of dirt or dust gets on the plate cylinder or the offset cylinder or on the ink rollers or even on the paper itself.

Unitrade 502 donut






Unitrade 607






Unitrade 699

I responded:




Well I got the 2012* Unitrade Catalogue from the library and it
still has the missing medallion as the variety same as in the 2006 edition, no change.

* I no longer have the snippet from the 2012 Unitrade
but here it is from the 2016 Unitrade Catalogue.




Therefore, alanl, if you have any facts or information contrary to
what is written in the catalogues then please let us know.

Here are a couple more inconstant varieties I found.

Unitrade/Scott 692




Unitrade/Scott 693

lithograving...You are doing great....Keep up the good work and I will make sure you are in my next stamp video..(ha,ha)...Excellent finds.

Thanks Wert but that's all I have for now.
There are some new varieties listed in the 2012 Unitrade
which aren't in my old 2006 edition but at the moment
I'm too lazy to check my stock.

It's up to you buddy.

On the 2010 Marine Life issue, stamp #2387di, (row 1, column 2) from booklet #BK429c, only from booklets with a cylinder number of 1 on the right-hand selvedge, located within the spiral of waves above the mother sea otter, are two extra dots. The upper dot sometimes moves to touch the bubble above it.





This was jointly issued with Sweden so I wonder if this variety would be on Swedish stamps also?

Other mistakes and interesting anomalies occur on this issue also. See the thread on Stamp Community: https://goscf.com/t/8204

lithograving.....From what I read in the misty past....the first row
of the plate was correct(no medallion). The next 4 rows were made
with a fly speck on the negative. So there are fewer copies of the normal
stamp and they call it the variety and give it a higher value. Look
at the stamp with a magnifier and you will see its just a white spot.

Great post litho! I will have to scan what I have

The donuts are what are called 'ink hickeys' in the trade. A small piece of dirt gets on the plate and causes a 'shadow' around it where the plate doesn't touch the paper, so no ink is transfered. Very common.

'ink hickeys' eh? Learned something new again.

Thanks James.

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I'm anxious to see what you have BC.

Well lithograving old friend.....I will have to settle down and look for some pics to...Busy with Xmas, you know.

Back to the Krieghoff:

610ii, the "Extra log in the snow". It also has the broken door frame mentioned earlier.


Normal:


610iii, "Extended 1"


Normal:

Ink Hickey is a good name! So much talk is put into the plates and ink but in the process of most modern printing the main concept is ink and water where ink = oil. In order for the ink to only go where needed there is equal and opposite amount of water. In the high speed process water droplets fly easier than ink and if the paper is wet from water drops the ink will perform the gracious Hickey marks. I paid a little attention when I was a printer just not enough to stay in the trade.