


For me, the best thing is to use the corners guard for envelopes and cards. I use Corner Stamp Mounts Lighthouse Self Adhesive, coming in different sizes. There are other brands. You can even make your own using sturdy paper or cardboard. (custom-made)

@Milco
You said "I really like, when sender, properly attach postage stamps and post office worker properly apply hand cancel!"
Question: What do you consider hand cancel?
1899
hand cancels are devices that are held with the four fingers and thumb surrounding a handle; at the business end of the handle is a device that contains location, date, and time. Some are self-inking with a recessed well; others need to be re-inked from a separate well. They all require the clerk to aim and strike the cover with said device. No machinery is involved.
They were often used prior to automation; and many POs continue to use them when requested.
Also a black magic marker could be used!
David,
I suppose one could use a magic marker, Sharie, or other pen-like device and call it a "hand-cancelled." But that terminology is so utterly inappropriate that unless the user were completely unaware of philatelic conventions, I'd think they were just being nasty, flippant, or looking for a fight.
seems that I'm just wasting my time watching another thread being hi-jacked for your amusement.
smh
@amsd
The OP is from a foreign country.
I don't know what the OP considers a proper hand cancel?
I thought SOR is for people to discusss stamps, as it's says above "For People Who Love To Talk About Stamps Discussion - Member to Member Sales - Research Center"
I like asking questions, is asking questions NOT ALLOWED ANY MORE!
You said "seems that I'm just wasting my time watching another thread being hi-jacked for your amusement." I resent this remark!!!.
I simply asked a question, asking a question is not hi-jacking a thread.
Guess I'm wrong thinking sor is for members, now it's just a play ground for you!
"Also a black magic marker could be used!"
@1899
It seems to me that you asked for clarification of "hand-cancel", and amsd provided you with a very polite answer. IMHO the response of your casual and flippant remark about a black magic marker being used as a hand-cancel was really uncalled for. Milco has been a member of Stamporama for nearly 20 years, and during that time has shared his wealth of knowledge selflessly on this discussion board. I really appreciate the other members in discussion who are thoughtful, courteous and helpful.
P.S. What does it matter if the OP is outside the US? A "hand-cancel" is still a "hand-cancel" anywhere in the world!

This used to be a fun place to read or post, lately it's turned into a bit of a disaster area!! I think it's about time something is done or we're going to start losing good people! Of course, this is all just my opinion for what it's worth!!

I suggest that some of us send private messages to the "powers that be" and express our concerns about what is happening here and provide a solution to this problem. I could state the obvious solution right here and now but I think it should be done privately!!
As for the original question, given that many plastics are not stable, they could degrade over time damaging the stamps. The best you could do is keep it out of sunlight and monitor.

I really like, when sender, properly attach postage stamps and post office worker properly apply hand cancel!
It is really rare today, where most of shipment will be without postage stamps or without stamp properly canceled!
Something another worry me, and it is, that this "cover" are plastic material, so I don't have any experience, how, over the time this material will react?!
Most of plastic, will start to decay over time, probably, will affect stamps alone!
So, what and how to avoid this kind of damage, and still keep cover intact?
We know, that one really PU cover, have premium in value, than properly placed and canceled stamp on cover, one really traveled PU cover, will have even more premium on market.
Does anyone have experience with this matter?

re: Plastic cover and how it will affect postage stamps on it:
For me, the best thing is to use the corners guard for envelopes and cards. I use Corner Stamp Mounts Lighthouse Self Adhesive, coming in different sizes. There are other brands. You can even make your own using sturdy paper or cardboard. (custom-made)


re: Plastic cover and how it will affect postage stamps on it:
@Milco
You said "I really like, when sender, properly attach postage stamps and post office worker properly apply hand cancel!"
Question: What do you consider hand cancel?
re: Plastic cover and how it will affect postage stamps on it:
1899
hand cancels are devices that are held with the four fingers and thumb surrounding a handle; at the business end of the handle is a device that contains location, date, and time. Some are self-inking with a recessed well; others need to be re-inked from a separate well. They all require the clerk to aim and strike the cover with said device. No machinery is involved.
They were often used prior to automation; and many POs continue to use them when requested.

re: Plastic cover and how it will affect postage stamps on it:
Also a black magic marker could be used!
re: Plastic cover and how it will affect postage stamps on it:
David,
I suppose one could use a magic marker, Sharie, or other pen-like device and call it a "hand-cancelled." But that terminology is so utterly inappropriate that unless the user were completely unaware of philatelic conventions, I'd think they were just being nasty, flippant, or looking for a fight.
seems that I'm just wasting my time watching another thread being hi-jacked for your amusement.
smh

re: Plastic cover and how it will affect postage stamps on it:
@amsd
The OP is from a foreign country.
I don't know what the OP considers a proper hand cancel?
I thought SOR is for people to discusss stamps, as it's says above "For People Who Love To Talk About Stamps Discussion - Member to Member Sales - Research Center"
I like asking questions, is asking questions NOT ALLOWED ANY MORE!
You said "seems that I'm just wasting my time watching another thread being hi-jacked for your amusement." I resent this remark!!!.
I simply asked a question, asking a question is not hi-jacking a thread.
Guess I'm wrong thinking sor is for members, now it's just a play ground for you!

re: Plastic cover and how it will affect postage stamps on it:
"Also a black magic marker could be used!"

re: Plastic cover and how it will affect postage stamps on it:
@1899
It seems to me that you asked for clarification of "hand-cancel", and amsd provided you with a very polite answer. IMHO the response of your casual and flippant remark about a black magic marker being used as a hand-cancel was really uncalled for. Milco has been a member of Stamporama for nearly 20 years, and during that time has shared his wealth of knowledge selflessly on this discussion board. I really appreciate the other members in discussion who are thoughtful, courteous and helpful.
P.S. What does it matter if the OP is outside the US? A "hand-cancel" is still a "hand-cancel" anywhere in the world!
re: Plastic cover and how it will affect postage stamps on it:
This used to be a fun place to read or post, lately it's turned into a bit of a disaster area!! I think it's about time something is done or we're going to start losing good people! Of course, this is all just my opinion for what it's worth!!
re: Plastic cover and how it will affect postage stamps on it:
I suggest that some of us send private messages to the "powers that be" and express our concerns about what is happening here and provide a solution to this problem. I could state the obvious solution right here and now but I think it should be done privately!!

re: Plastic cover and how it will affect postage stamps on it:
As for the original question, given that many plastics are not stable, they could degrade over time damaging the stamps. The best you could do is keep it out of sunlight and monitor.