Sulfur dyes are one of the most widely used dye. It was reported that the production of sulfur dye reaches more than a hundred thousand of tons throughout the world, and one of the most important varieties are sulfur black dye. Currently, the sulphur black accounts for 75%~80% of the total sulfur dyes. It is by the favor of dyeing and printing factory for its synthesis simplicity, low cost, good fastness and no carcinogenic. It is widely used in the dyeing of cotton and other cellulose fibers. Sulphur dyes with more vivid color and the fastness to chlorine bleaching is relatively good. But some yellow and orange varieties have photosensitive tendering effect on fiber.
In recent years, liquid sulfur dyes, ultrafine dispersion sulfur dyes and environment-friendly sulfur dyes is developing rapidly. As the requirements to environment is higher, the ecological selection of sulphur dyes reductant and oxidant is necessary. It is widely used in the dyeing of cotton and other cellulose fibers. Sulphur dyes with more vivid color and the fastness to chlorine bleaching is relatively good. But some yellow and orange varieties have photosensitive tendering effect on fiber.
According to the different dyeing conditions, sulphur dye divided into two kinds: sodium sulfide is used as a reducing agent for dyeing of sulfur dyes; even two sodium sulfite is used as a reducing agent sulfur reduction dyes. For ease of use, the sulfur dyes use sodium metabisulfite or sodium formaldehyde sulfoxylate substituent sulfonic acids to get water-soluble sulfur dye, and the dye can directly dyeing without a reducing agent.
I. sulfur dyes that use sodium sulfide as a reducing agent
II. the curing VAT of hydrosulfite is used as a reducing agent
III. liquid sulfur dyes are developed in order to facilitate the processing and production of a new type of sulfur dyes.
Such dyes uses are similar to soluble VAT dye, the configurations can be directly add water according to proportional. It's no need to add a reducing agent, only partially light color dye should add some sodium sulfide, and such dye color spectrum is wide.
There are two mehods of industrial production of sulfur dyes:
I. Baking Raw materials of aromatic amines, phenols or nitro compounds with sulfur or polysulfide baking at a high temperature to produce yellow, Orange and Brown sulfur dyes.
II. Boiling Raw materials of aromatic amines, phenols or nitro compounds with sodium polysulfide heated to boiling in water or organic solvents to produce black, blue, green sulphur dyes.
There are few things in this world that can captivate a child's energy and excitement the way a full sized back yard trampoline can. The idea of a perfect jumping surface -- one that's designed to help them launch themselves ten feet or higher into the air -- is overwhelmingly tantalizing. If you've got children that are just dying for a new activity that will help them expend energy throughout the day, there's nothing better than a new trampoline. The only problem is that after a while, even a regular trampoline can seem boring once they've gotten used to jumping. That's why many people purchase attachable trampoline games that can be used to breathe new life into this great toy.
If you've not yet purchased a trampoline before, you might confused as to how trampoline accessories like games and jumping boards can actually be used safely on a trampoline. IT's important for all parents and school teachers to understand that while kids may be fearless when it comes to jumping on the trampoline, they're not always aware of all the possibilities for injury. It's imperative that children under the age of fifteen always been supervised while they're playing on the trampoline mat. Even older children must be advised of the trampoline house rules.
There are several trampoline accessories that can be added to the structure to decrease the chances that someone could get injured while playing trampoline games. Most importantly, all jumping platforms should be fitted with a trampoline net or enclosure. These are simply to install features that form a flexible cage all around the edge of the trampoline. This feature keeps people from falling off the trampoline while they're jumping, and from landing on the hard edge of the trampoline frame.
Once you've got your trampoline net installed, it's time to think about which trampoline accessories you can install for hours of fun in the sun. A trampoline basketball toy is a great addition when you've got kids who want to work on their super dunk shot. Thanks to the elasticity of the trampoline mat, they'll be able to jump high into the air, slamming the ball into the hoop for an all star dunk every time. Even just shooting the ball from different areas of the trampoline can help improve their shooting skills and balance. Typical trampoline basketball set hoops can be purchased online for less than one hundred and fifty dollars.