wallpaper seams on very dark papers

[Bigshaggy]

hi there, i do a lot of painting and decorating with good results but i'm having a problem with very dark patterned papers that i cant overcome myself and need advice. lining papers, anaglyptas, light coloured flat papers all no prob but the past twice ,once with a homebase dark brown paper and with a laura ashley isodore charcole paper i am getting the faintest of white lines showing at each seam(so little that you wouldnt even see the seam on a lighter coloured paper).the house is only 5 yr old so walls like new,previously painted in emulsioned i used a seam roller didnt over wipe the seams,pasted one length at a time to make sure i didnt over soak the paper but still these lines. its not like a gap at the seams its like a white hair only showing up when the light hits it and i know a coloured pencil would help some but im looking for how to avoid it at all. ps i didnt line the walls as the surfaces were good and not porous.any help appreciated

 

[opps]

Some of the old school decorators that I know use coloured crayons that you can get from "real" decorators merchants- you wont find them in the DIY sheds

I once had the same problem with metallic gold paper. The seem was only visible for about one hour each day as the sun moved. I had to rehang the whole wall, soaking the paper for half of the time.

 

[Bigshaggy]

do you think lining paper would have helped by absorbing some of the paste quicker?it was only a 3 minute soak time on the label and with the wall having been emulsioned already(sealed) i wondered if it was still soaking on the wall?

 

[opps]

Not sure

I normally line as a matter of course.

Some papers are just horrible to work with!!!