It was de-colorized with manganese and required purified alkalis and special care to make. Still, it was slightly grayish and bubbled, and could only be considered of good quality in comparison to what else was available.
It was mostly used on blown vessels, which helped make it as clear as possible. In Michael Muller at St. Anton in south Bohemia introduced chalk glass which came to know as Bohemian crystal.
This was widely used by his countrymen, bit its brilliance was difficult to maintain. Another user of lead glass was the company of garnet cutters in Turnov, Bohemia.
Disturbed by the success of Venetian imitations, they sent the Fiser brothers to Venice to learn the secrets of making imitation stones. By they had developed a formula for composition, a lead-rich glass. They colored it red with gold to make a successful garnet simulation the garnets of Bohemia are the red pyrope type.
At first these imitation garnets were crudely pressed then cut into artificial stones; work done secretly by the garnet cutters. In time, it grew into the thriving Czech glass bead industry. The Czech bead industry, while centered at Jabonec nad Nisou, was scattered into the countryside throughout the Jizera or Iser Mountains in Bohemia and neighboring Silesia. Your email is never shared. With over colors in stock at the Rhinestone Shop, your creativity can go wild! Bookmark the permalink.
Follow any comments here with the RSS feed for this post. Post a comment or leave a trackback: Trackback URL. Post a Comment Your email is never shared. Welcome to the Rhinestone Blog! Connect With Us! All rights reserved. Shangri-La Road, Phoenix, Arizona, Swarovski has a long history and is the leading brand of crystal rhinestones.
It is internationally renowned, has a unique cutting process, and manufactures well-known crystal rhinestones. Therefore, in terms of materials, Swarovski has the best rhinestones for clothing, followed by Preciosa rhinestones, high quality glass rhinestones, and then plastic rhinestones, including acrylic and resin rhinestones. If you have experience in purchasing rhinestones, you may have encountered this situation: the rhinestones are made of the same materials, the size and color of these are the same, but why is the price is so different?
How do you judge their quality? Of course, different materials of rhinestones have different judgment methods. Next, we will explain how to judge the quality of acrylic rhinestones. Acrylic rhinestones are made of acrylic PMMA, polymethyl methacrylate and molded through injection moulding. The acrylic material has the advantages of high transparency, low price, and easy machining, so it is used as a material for making plastic rhinestones.
In Taiwan or in mainland China, there are a few factories that produce acrylic rhinestones, and each of them produce different rhinestones. Therefore, having a basic knowledge of acrylic rhinestones and the method of judging their quality is very important for the purchaser. The reason why rhinestones are bright and flickering is because of the high transmittance of acrylic materials. In addition, the light is incident on the bottom of the product and is formed by the radiance of the different cut surfaces.
We use rhinestones because of their flickering characteristics like diamonds, which are decorated in clothing or accessories to make the accessories shine. Therefore, the degree of reflection of the rhinestone is what we can observe. Generally, a better quality rhinestone has a higher degree of reflection and translucency. What does the brightness of the acrylic rhinestone had to do with? The following are three descriptions of raw materials, molds and injection technology.
If a better acrylic material is used, the transparency of the rhinestone is usually higher. This concept is like the importance of ingredients in cooking. If you use high-quality ingredients, the cooking is usually top-notch.
Acrylic raw materials PMMA were invented by German scientists in the early 20th century and mass production began in Presently speaking, there are many manufacturers all over the world, and the acrylic raw materials of the Taiwan CHIMEI Corporation are well-known acrylic raw materials in the world. Pointed back or flat back rhinestones are injected through a mold, so the quality of the mold will also affect the quality of the acrylic rhinestone. A high-quality mold can produce a flat and smooth acrylic rhinestone with high-reflection.
So, what exactly is a good mold? It can be known from the process and method of mold manufacturing. Usually, the cost of high-quality molds is very high.
In addition to the mold, the technology of injection is also a factor. The quality of products made from plastic injection depends on many factors, such as temperature and time. An experienced master is able to judge the most appropriate production factor and produce high-quality products. If you do not have direct access to the original manufacturer, you can find this out from the appearance of the rhinestone.
Since the shine of the rhinestone is caused by the refraction of light, if the surface is flat, the refracted light is relatively bright and shiny, so are you able to take a closer look at the sharpness of the cut surface of the rhinestone? Is the surface flat? The interface of the edge of the acrylic rhinestone is the injection gate that will inevitably be produced during the injection molding process.
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