Wrinkles in Epson Heavyweight Matte Paper using Epson 1270

I went to a reception this evening for a friend's daughter's wedding

and while there I noticed one of my prints on her wall. It was done

when I first bought my Epson 1270, not long after the printer came

out. This picture is printed on Epson Heavyweight Matte Paper in the

Super A3 size. The thing that caught my attention is that there are

wrinkles appearing in the print. The frame is (semi) air-tight, the

print is behind a matte and is mounted in a hanging fashion from the

top. I have never noticed this in any of the Ciba-chrome prints I've

done and this is the oldest of my Epson prints that I've seen. I am

now concerned about the other Epson prints I've sold.

Any one have any experiance with this?

Thanks,

I don't know about Heavyweight Matte but I've always printed on Archival Matte (on

my 870 and 2200) and in the couple of years that I've been printing (most prints have

been done on the 870 until I got the 2200) I've not seen any wrinkles.

I usually allow the print to dry for a few hours and then set the print between some

archival backing board and a sacrificial sheet of Archival Matte. All of this is then

set underneath one of my large coffee table books for a day or so to be sure to press

out any potential wrinkles. Seems to work so far using the same framing method that

you use.