Glazed Gum

Hi. Does anyone have a scan of a 1950's or 1960's Canadian stamp with lazed gum? Thanks.

According to Unitrade (2015 edition)

All stamps issued prior to 1971 had dextrine gum except part of the Centennial series and the 1966 Highway Safety stamp.

The Centennial commemoratives had davec gum, whereas the 1967-1973 Centennial definitives had PVA gum.

Early PVA has a matte apperance and lacks any shine. Later PVA has a more shiny effect, but less than dextrine gum. Transparent , colourless gum was introduced in the spring of 2010.

I have no idea what glazed gum is or if it was used. Do you have any SC numbers we can check for you?

I normally think of glazed gum as a gum flaw caused by moisture, especially in relation to over-wetting stamp mounts.

I haven't an idea, really, of what glazed gum looks like. These stamps for sale are described as having disturbed and heavily glazed gum.

Glazed gum refers to a condition in which the gum looks shiny.

Some plate number coils ( PNC's ) were issued with a shiny gum. It was really very shiny; is this what you're talking about?

Peter

Here is the definition from the Philatelic Foundation site

Glazed Gum Original gum in an altered state due to its softening and reforming, often while in a plastic mount.

Shiny gum as issued always has some texture visible. Glazed gum looks like wet ice and does not affect the whole stamp. It often is seen as a thin line since the moisture entered through the slit in the back of the mount. If enough moisture got in, the area that looks like ice may appear amorphous from seepage beyond the slit in the mount.

It would be very hard to scan gum glazes but with a camera you might see them if you catch the the light reflecting from the gum.

Is it beneficial to just soak the gum of the old stamps where the gum is all cracked and curling?

Common sense tells me yes to just soak them and put the gum out of it's misery but purists may disagree.

I soaked all my old German stamps that were like that but only because catalog value of mint stamps fro that era were at the catalog minimum