In your review of Indigo Artpaper, the only reason you gave to paint on hand-made paper was “why not?” You could add: surface texture, suppleness, and water handling:
Most machine-made paper have a “grid” texture, (Fabriano, for example.) Some hand-made papers do as well. Indigo paper has such a grid, most obvious on one side than the reverse. (Your video https://youtu.be/RXhgC7qsK6M at 3:33)
Few machine-made papers have a really random pattern. Arches, is appreciated for that.
The beauty of many hand-made papers like St-Armand papers is not spoiled by a “grid” look. Their texture has a random pattern.
Rag paper is more solid than linters paper. The longer fibre in rag paper means it can sustain more water. 210gsm Khadi paper can sustain as much or more water than 300gsm papers, because it is made of rag cotton. Even their 150gsm paper compares well with many 300gsm papers.
Rag paper can also handle more work, or fiddling, but this can also depend on surface sizing. (For example, using tape or masking fluid damages Khadi paper. But that is due to Khadi’s poorer surface seizing.) Among the St-Armand paper mill products, the Dominion paper is “harder” than the St-Armand paper. Both have internal and surface sizing, but Dominion has more surface seizing, making it “harder.” Khadi 100 and 150gsm papers is only internally sized. Their 220, 320, 640 and 1000 Watercolor papers are both internally and externally sized.
There is also the different “feel” of rag paper vs linters paper.
Linters paper (like Arches) feels like cardboard . Rag paper feels a bit like thick fabric. Turning the pages of a rag paper sketchbook like Khadi sketchbooks seems like handling fabric. It is thick, yet supple. Arches and other 100% cotton paper is crisp, not supple. Rag paper can be rolled without dents or kinks or wrinkles.
Of course, watercolor paper also becomes “harder”, when it is “hard-sized”, which means when seizing is applied on the surface of the fabric (on top of already having been seized internally.) But there is an intrinsic rigidity in linters cotton paper that is not found in rag cotton paper.
Rag cotton is made from from remnants from the cotton-garment industry.
Linters cotton is the fuzzy down-like fibre of the cotton seed.
When cotton is ginned, the long staple cotton is removed from the seed and used in the textile industry to make cloth. Then the seed is further processed in a machine called a "linter", which removes the rest of the seed hairs (the closer to the seed, the shorter the fiber). https://carriagehousepaper.com/cotton-linters-2nd-cu
Rag fibers are longer fibers compared to cotton linters so they do provide extra strength. Cotton linters are pure cellulose fibers that are byproducts of cotton processing. Although the cotton linters' fibers are shorter than textiles, they still offer outstanding strength and archival properties. https://www.strathmoreartist.com/faq-full/are-cotton-papers-and-rag-pape...
Linters cotton description in Arches mill:
In the very strong industrial papermaking history of the Vosges, land of water and forests, and still today the leading paper department in France, the Arches factory is unique: its art and printing paper is made only cotton (some references also include linen or hemp). These fibers, longer than those of wood, can tangle more, and absorb paint better. In the Middle Ages were used waste from the textile industry, also very present in the Vosges, and old rags from hospitals, especially flax and hemp. Today, cotton linter (fibers remaining on cotton seeds after they have been ginned) arrive in sheets from abroad at the Arches paper mill.
In your review of Indigo Artpaper, the only reason you gave to paint on hand-made paper was “why not?” You could add: surface texture, suppleness, and water handling:
Most machine-made paper have a “grid” texture, (Fabriano, for example.) Some hand-made papers do as well. Indigo paper has such a grid, most obvious on one side than the reverse. (Your video https://youtu.be/RXhgC7qsK6M at 3:33)
Few machine-made papers have a really random pattern. Arches, is appreciated for that.
The beauty of many hand-made papers like St-Armand papers is not spoiled by a “grid” look. Their texture has a random pattern.
Rag paper is more solid than linters paper. The longer fibre in rag paper means it can sustain more water. 210gsm Khadi paper can sustain as much or more water than 300gsm papers, because it is made of rag cotton. Even their 150gsm paper compares well with many 300gsm papers.
Rag paper can also handle more work, or fiddling, but this can also depend on surface sizing. (For example, using tape or masking fluid damages Khadi paper. But that is due to Khadi’s poorer surface seizing.) Among the St-Armand paper mill products, the Dominion paper is “harder” than the St-Armand paper. Both have internal and surface sizing, but Dominion has more surface seizing, making it “harder.” Khadi 100 and 150gsm papers is only internally sized. Their 220, 320, 640 and 1000 Watercolor papers are both internally and externally sized.
St-Armand paper: http://www.st-armand.com/English/E01-welcome.php
St-Armand Dominion paper: http://www.st-armand.com/English/E02a-Dominion.php
St-Armand paper : http://www.st-armand.com/English/E02b-White.php
Canal paper serves for watercolor, but much thinner: http://www.st-armand.com/English/E02h-Canal.php
There is also the different “feel” of rag paper vs linters paper.
Linters paper (like Arches) feels like cardboard . Rag paper feels a bit like thick fabric. Turning the pages of a rag paper sketchbook like Khadi sketchbooks seems like handling fabric. It is thick, yet supple. Arches and other 100% cotton paper is crisp, not supple. Rag paper can be rolled without dents or kinks or wrinkles.
Of course, watercolor paper also becomes “harder”, when it is “hard-sized”, which means when seizing is applied on the surface of the fabric (on top of already having been seized internally.) But there is an intrinsic rigidity in linters cotton paper that is not found in rag cotton paper.
Rag cotton is made from from remnants from the cotton-garment industry.
Linters cotton is the fuzzy down-like fibre of the cotton seed.
When cotton is ginned, the long staple cotton is removed from the seed and used in the textile industry to make cloth. Then the seed is further processed in a machine called a "linter", which removes the rest of the seed hairs (the closer to the seed, the shorter the fiber).
https://carriagehousepaper.com/cotton-linters-2nd-cu
Rag fibers are longer fibers compared to cotton linters so they do provide extra strength. Cotton linters are pure cellulose fibers that are byproducts of cotton processing. Although the cotton linters' fibers are shorter than textiles, they still offer outstanding strength and archival properties.
https://www.strathmoreartist.com/faq-full/are-cotton-papers-and-rag-pape...
Sturdiness of rag cotton paper ( Indigo Artpaper review)
https://youtu.be/-CCTsxsgoIw (at 2 : 00)
Linters cotton description in Arches mill:
In the very strong industrial papermaking history of the Vosges, land of water and forests, and still today the leading paper department in France, the Arches factory is unique: its art and printing paper is made only cotton (some references also include linen or hemp). These fibers, longer than those of wood, can tangle more, and absorb paint better. In the Middle Ages were used waste from the textile industry, also very present in the Vosges, and old rags from hospitals, especially flax and hemp. Today, cotton linter (fibers remaining on cotton seeds after they have been ginned) arrive in sheets from abroad at the Arches paper mill.
https://www.la-croix.com/France/Arches-papier-coton-artistes-2018-07-23-...
If you enjoyed this, I have many, many ideas for topics linked to art (watercolor) supplies never yet discussed.
Fir example, Khadi Long Books: BBL3 and BBL4 have never been reviewed ( long panoramic and XXL 320gsm sketchbooks.) Amazing!
https://www.khadi.com/shop/long-book-bbl3-rough/
https://www.khadi.com/shop/long-book-bbl4-rough/
Khadi 640 gsm paper HP and CP, and 1000gsm CP watercolor paper has never been reviewed.