Much like in wallet making, I'm not a big believer in having the product stiff without contents, because very few people walk around with nothing in it.
People will use a padfolio with a notepad, pens, cards, notes, possibly a tablet already in it, and this creates most of its structure.
However, if by soft calf you are referring to something you could use in upholstery or a leather jacket, that indeed will require some stiffening.
PVA soaked canvas
Cellulose fiberboard (Texon)
Oil resistant gasket paper (Flexoid)
Thin firm veg-tan leather
Bonded leatherboard (Salpa etc)
Most on the above list will stiffen, but will remain flexible if a corner is bent too far unlike cardboard. Cardboard can be used, though it can degrade if moisture gets in and it can also delaminate when exposed to opposing forces or continued flex.
If you want something quick and easy to get, Flexoid is underrated for reinforcement purposes. And I kind of like the smell. Try a sample first in the 0.5 - 0.8mm range.
Hi Vagn.
Much like in wallet making, I'm not a big believer in having the product stiff without contents, because very few people walk around with nothing in it.
People will use a padfolio with a notepad, pens, cards, notes, possibly a tablet already in it, and this creates most of its structure.
However, if by soft calf you are referring to something you could use in upholstery or a leather jacket, that indeed will require some stiffening.
PVA soaked canvas
Cellulose fiberboard (Texon)
Oil resistant gasket paper (Flexoid)
Thin firm veg-tan leather
Bonded leatherboard (Salpa etc)
Most on the above list will stiffen, but will remain flexible if a corner is bent too far unlike cardboard. Cardboard can be used, though it can degrade if moisture gets in and it can also delaminate when exposed to opposing forces or continued flex.
If you want something quick and easy to get, Flexoid is underrated for reinforcement purposes. And I kind of like the smell. Try a sample first in the 0.5 - 0.8mm range.