describe: QST type transparency standard tube is according toGB/T1721 "Determination of Appearance and Transparency of Varnishes, Oils, and Thinners", mainly used to judge the appearance and transparency of varnish, oil, paint and thinner, etcWhether it contains mechanical materials and the degree of turbidity it presents. It has the characteristics of simplicity, convenience, and speedIt is one of the instruments for coating inspection

Main technical parameters:

■ Work standards3 colorless liquid standard samples and3 standard samples of colored liquids

Strictly follow national standardsPreparation requirements in GB1721:

■ Plug colorimetric tube: Capacity25 milliliters

Wooden concealed box: Bring your own

■ Validity period of the instrument: 6 months