トラガカント ゴム

もっと見る

トラガカント ゴム

在庫: 在庫あり

GO-000020
This natural water-soluble gum originates from the dried sap of the Middle-Eastern astragalus trees.
GO-000020, Gomme adragante

トラガカント ゴム , 57 g

$38.45
GO-000020, Gomme adragante

トラガカント ゴム , 113 g

$67.25
GO-000020, Gomme adragante

トラガカント ゴム , 454 g

$204.55
概要

詳細

Gum tragacanth

Gum tragacanth is a natural gum obtained from the dried mucilaginous sap of several species of the astragalus shrub genre native to the Middle East. This viscous gum is odorless and tasteless. Chemically it is composed of a mixture of polysaccharides some of which will dissolve and others that absorb water to form a colloidal gel. Tragacanth is known for its viscosity, which can reach 3400 cps for a 1% solution of the best quality gum.

Gum tragacanth is the traditional binder used to make artists' dry pastels, as it does not adhere to itself the same way other gums (such as gum Arabic) do when dry and also because the gel it forms is strong enough to hold the pigments (even the heavy ones) in a firm homogenous paste that is easy to shape into pastels. This gum is also sometimes called Shiraz gum, shiraz, gum elect or gum dragon.

identification

  • CAS: 900-65-1
  • EINECS: 232-552-5

physical properties

  • Appearance : off-white to light yellow free flowing powder
  • Taste and odor: bland, mucilaginous
  • Particle size through US 140 mesh (105µm) : 95% minimum
  • Particle size through US 200 mesh (74µm): 65% minimum
  • Viscosity 15 solution : 1 000 cps minimum
  • Ph 1% solution : 5.0 – 6.0
  • Heavy metals: 40 ppm maximum
  • Moisture 15% maximum
  • Arsenic: 3 ppm maximum
  • Lead: 10 ppm maximum

All values given in the International System of Units (SI), unless otherwise noted.

All the information above is, to the best of our knowledge, considered to be exact and does not constitute a product specification. Always test materials prior to selecting them for definitive use.

追加情報

追加情報

カタログコード GO-000020
couleur いいえ
Country of Manufacture カナダ
Manufacturer kama pigments
disponible pour expédition gratuite はい
レビュー

以下の商品にご興味はありませんか?

商品のタグ

タグを区切るには空白を使って下さい。タグがフレーズの場合は、「'」で囲って下さい。

あなたのレビューを投稿する

Only registered users can write reviews. Please, log in or register