bleaching agents to improve whiteness in minerals

2020-07-05T14:07:03+00:00
  • bleaching agents to improve whiteness in minerals ...

    Skin whitening agents are help to improve texture of skin. essential nutrients like vitamins and minerals aur foot,aur face ko kis tarha sa jaldi white Tooth Whitening, Teeth Bleaching due to changes in the mineral fabricate custom fitted whitening trays that will greatly improve of light-activated bleaching.

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  • Effects of experimental bleaching agents on the mineral ...

    Yet, studies have observed that home-applied bleaching agents (10% carbamide peroxide), enhanced with high concentrations of fluoride (0.2%) or calcium (0.2%) applied 6 h a day for 14 days, minimized enamel mineral loss. 7,16 Therefore, it is possible that the addition of fluoride or calcium to high-concentrated bleaching agents (35% hydrogen peroxide) could prevent mineral loss.

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  • Suitable Bleaching Agents for Talc - Hydrometallurgy ...

    Robert, the bleaching/leaching would be to increase the whiteness of the talc. Currently, the talc is considered to be white or maybe "off-white" in color and my aim is to get it to "brilliant white". Now, these colors should be quantified on a scale (e.g., Hunter) but unfortunately the clients in this part of the world simply use the eye test.

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  • Bleaching Agents - Farr - - Major Reference Works - Wiley ...

    Sep 19, 2003  The reducing agents generally used in bleaching include sulfur dioxide, sulfurous acid, bisulfites, sulfites, hydrosulfite (dithionites), sodium sulfoxylate formaldehyde, and sodium borohydride. These materials are used mainly in pulp and textile bleaching.

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  • US4824653A - Method of bleaching limestone - Google Patents

    This invention relates to a method of bleaching limestone, and more particularly to a method for removing small amounts of iron, usually in the form of iron oxide, from the limestone in order to...

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  • An Introduction to Gem Treatments

    Bleaching – a chemical used to alter / reduce a component of, or the entire color, of a porous gem. Some gemstones are bleached and then dyed, a form of “combination treatment.” 1. The most commonly encountered bleached gems include: Jadeite jade – Jadeite is often bleached with acid to remove an unwanted brown component from the ...

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  • Food Bleaching Agents Market Size, Share, Industry ...

    The use of bleaching agents in flour will improve the color, brightness, and natural softness of the dough. Chlorine is a highly effective yet inexpensive food bleaching agent to control foodborne diseases. Increasing demand for hydrogen peroxide in the food and beverage industry is expected to drive the global food bleaching agent market.

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  • Whiteness - an overview ScienceDirect Topics

    If high whites are required, both natural and regenerated cellulose fibres may be chemically bleached and treated with a fluorescent brightening agent. 28,29 Fluorescent brightening agents are based on diaminostilbene derivatives, triazoles, aminocoumarins, and many other organic compounds and are absorbed by the fibre.

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  • Food Additives - SlideShare

    Sep 02, 2015  Flour Bleaching Agents and Bread Improvers • Benzoyl peroxide • Commonly used flour bleaching agent • A bleaching or decolorizing action • But does not influence baking properties • Free radical initiator • Added to flour (0.25-0.075 %) at the mill • Usually added along with diluting or stabilizing agents (calcium sulfate ...

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  • Effects of experimental bleaching agents on the mineral ...

    Effects of experimental bleaching agents on the mineral content of ... in vitro studies have demonstrated increase ... peroxide agent (Whiteness HP Maxx – FGM Dental Products, Joinville, SC ...

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  • Effects of bleaching and functionalization of kaolinite on ...

    In Fig. 9a, it can be seen that the whiteness index of kaolin was improved firstly through the bleaching treatment and then by the chemical intercalation. Precisely, the use of leaching agent exhibited a significant increase in the whiteness index of kaolinite powder from 33.09%, yielding a value of 46.97%.

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  • Suitable Bleaching Agents for Talc - Hydrometallurgy ...

    Robert, the bleaching/leaching would be to increase the whiteness of the talc. Currently, the talc is considered to be white or maybe "off-white" in color and my aim is to get it to "brilliant white". Now, these colors should be quantified on a scale (e.g., Hunter) but unfortunately the clients in this part of the world simply use the eye test.

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  • Effects of a bleaching agent with calcium on bovine enamel

    The bleaching agents were used according to the manufacturers’ recommendations. Bleaching treatments were performed in three sessions, with an interval of 7 days between each session. The Whiteness HP 35% (HP concentrate, thickener, glycol, and water) was applied 3

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  • Susceptibility of Enamel Treated with Bleaching Agents to ...

    Tezel et al. researched the effects of different bleaching agents with different concentrations on Ca 2+ loss from enamel. It has been concluded that higher concentrations of HP resolve more Ca 2+ from the enamel surface. Thus, more changes may occur on enamel structure as the concentrations of bleaching agent increase.

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  • The effects of seven carbamide peroxide bleaching agents ...

    Oct 01, 2003  With 10, 15, 16 or 22 percent carbamide peroxide concentrations, the same esthetic results can be achieved in a shorter time, compared with the results for lower concentrations of carbamide peroxide agents, 5 even though an increase in tooth sensitivity can occur.3, 5 When other ingredients are added to the bleaching agent, as is the case for ...

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  • Susceptibility of Enamel Treated with Bleaching Agents to ...

    Aug 01, 2011  Objectives . Controversial reports exist whether bleaching agents cause a susceptibility to demineralization. The aim of this study was to compare the calcium loss of enamel treated with different bleaching agents and activation methods. Method and Materials . The specimens obtained from human premolars were treated in accordance with manufacturer protocols; 10#x25; carbamide

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  • Effect of bleaching agents having a neutral pH on the ...

    Aim: To investigate the effect of bleaching agents having a neutral pH on the surface of mineral trioxide aggregate (MTA) used as a coronal seal material for nonvital bleaching, beneath the bleaching agent, with the help of energy dispersive X-ray microanalysis and scanning electron microscopy (SEM). Materials and Methods: Six samples of plastic tubes filled with white MTA (Angelus white) were ...

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  • (PDF) Effect of Different bleaching agents on cotton ...

    Grey cotton fabric contains natural color and impurities on its surface. To remove those impurities and improve whiteness cotton is treated with bleaching agents. Inthis project, I used three different oxidative bleaching agents, such as- Hydrogen

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  • (PDF) Do different bleaching protocols affect the enamel ...

    The significance of interpreting the effect of bleaching products on the enamel surface, particularly hardness, can help in administering the right dose of the bleaching agent on the vital teeth ...

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  • Effects of experimental bleaching agents on the mineral ...

    Therefore, the second hypothesis was rejected, as the addition of Ca or F to the 35% HP bleaching agent was unable to increase mineral concentration of enamel subsurface. Based on the exposed, the addition of F and Ca to the 35% HP agent could keep and increase the mineral content of enamel surface for both sound and demineralized substrates ...

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  • The Effects of Seven Carbamide Peroxide Bleaching Agents ...

    Background: Different concentrations of carbamide peroxide (10 to 22 percent) have been used successfully as bleaching agents, but the adverse effects on enamel microhardness at different times are unknown. Methods: The authors analyzed seven bleaching agents and a placebo. The agents were applied on the surface of human dental fragments for eight hours per day for 42 days and stored in

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  • Food Additives - SlideShare

    Sep 02, 2015  Flour Bleaching Agents and Bread Improvers • Benzoyl peroxide • Commonly used flour bleaching agent • A bleaching or decolorizing action • But does not influence baking properties • Free radical initiator • Added to flour (0.25-0.075 %) at the mill • Usually added along with diluting or stabilizing agents (calcium sulfate ...

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  • Papermaking - Bleaching and washing Britannica

    Papermaking - Papermaking - Bleaching and washing: The use of calcium and sodium hypochlorites to bleach paper stock dates from the beginning of the 19th century. In the early days of sulfite pulp manufacture, a single-stage treatment of pulp at low consistency, using calcium hypochlorite (chlorinated lime), satisfied most requirements. This simple bleaching treatment, however, is not ...

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  • Effects of experimental bleaching agents on the mineral ...

    Effects of experimental bleaching agents on the mineral content of ... in vitro studies have demonstrated increase ... peroxide agent (Whiteness HP Maxx – FGM Dental Products, Joinville, SC ...

  • Get Price
  • Susceptibility of Enamel Treated with Bleaching Agents to ...

    Aug 01, 2011  Objectives . Controversial reports exist whether bleaching agents cause a susceptibility to demineralization. The aim of this study was to compare the calcium loss of enamel treated with different bleaching agents and activation methods. Method and Materials . The specimens obtained from human premolars were treated in accordance with manufacturer protocols; 10#x25; carbamide

  • Get Price
  • Effect of bleaching agents having a neutral pH on the ...

    Aim: To investigate the effect of bleaching agents having a neutral pH on the surface of mineral trioxide aggregate (MTA) used as a coronal seal material for nonvital bleaching, beneath the bleaching agent, with the help of energy dispersive X-ray microanalysis and scanning electron microscopy (SEM). Materials and Methods: Six samples of plastic tubes filled with white MTA (Angelus white) were ...

  • Get Price
  • Effect of fluoride containing bleaching agents on enamel ...

    Group 5: Specimens treated with an experimental bleaching agent Ex-037 containing 0.37% fluoride. Table 1 lists the bleaching agents and fluoride gel used in thisstudy.ThespecimensinGroups2–5werebleached8 hper day for 14 days. The bleaching agents were applied on the enamel and stored at 100% humidity at 37 8C. After each

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  • PT Dunia Kimia Jaya Bleaching

    This product is also very effective in bleaching recycled pulp because its strong reducing properties. DEKABRIGHT BS-35 is a decoloring/bleaching agent composed with chlorine free-inorganic reductant which shows the decoloring effect to the direct, acid dyes and pigments consist of the azo and diazo groups as the chromophore in the recycled ...

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  • An Innovative Approach to Treat Incisors ...

    Sep 01, 2016  Molar Incisor Hypomineralization (MIH) is characterized by a developmentally derived deficiency in mineral enamel. Affected teeth present demarcated enamel opacities, ranging from white to brown; also hypoplasia can be associated. Patient frequently claims aesthetic discomfort if anterior teeth are involved. This problem leads patients to request a bleaching treatment to improve ...

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  • The etch-bleach-seal technique for managing stained

    bleaching agent. To allow better penetration of the bleach-ing agent the enamel surface is etched for 60 seconds with 37% phosphoric acid. Bleach and sealant application Sodium hypochlorite (5%) is applied to the entire tooth surface using a cotton applicator (Fig 2). The bleach is con-tinuously reapplied to the tooth as it evaporates. Often the

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  • (PDF) Do different bleaching protocols affect the enamel ...

    The significance of interpreting the effect of bleaching products on the enamel surface, particularly hardness, can help in administering the right dose of the bleaching agent on the vital teeth ...

  • Get Price
  • Dough conditioner - Wikipedia

    A dough conditioner, flour treatment agent, improving agent or bread improver is any ingredient or chemical added to bread dough to strengthen its texture or otherwise improve it in some way. Dough conditioners may include enzymes, yeast nutrients, mineral salts, oxidants and reductants, bleaching agents and emulsifiers. They are food additives combined with flour to improve baking functionality.

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  • Effects of bleaching on cotton fabric - SlideShare

    Aug 03, 2017  During bleaching we have to look after these points: Increasing the amount of bleaching agent can increase the whiteness of the fabric. But it can affect the strength. Bleaching temperature should not raise more than 100o C because for increasing the

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  • Efficiency of tooth bleaching agent on staining and ...

    Aug 10, 2020  Surface staining and deeper discoloration characteristics of peroxide-based bleaching agents in the nicotine stain in dental enamel model were evaluated in the present study. Nicotine stained dental enamel fragments (n = 36) were prepared and were subjected to the bleaching ingredients for a fixed treatment time of 30 min. The bleaching agents were composed of limonene, coconut

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  • The Effects of Seven Carbamide Peroxide Bleaching Agents ...

    Background: Different concentrations of carbamide peroxide (10 to 22 percent) have been used successfully as bleaching agents, but the adverse effects on enamel microhardness at different times are unknown. Methods: The authors analyzed seven bleaching agents and a placebo. The agents were applied on the surface of human dental fragments for eight hours per day for 42 days and stored in

  • Get Price
  • At home vital teeth bleaching: how to optimize a safe and ...

    Mar 16, 2021  Many authors recommend the addition of calcium and fluoride in bleaching agents to reduce enamel demineralization. However, according to Cavalli et al.’ study; even though experimental bleaching agents with calcium or fluoride reduced mineral loss, these agents were unable to reverse the enamel subsurface demineralization 26.

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  • Comparative Performance Evaluation of Conventional and ...

    Raza et al. reported that whiteness of fabric was increased by The results of whiteness under the effect of increasing the concentration and temperature [7]. bleaching techniques(P), bleaching agents(B), concentrations(C), temperatures(T) and bleaching In case of the effect of bleaching duration durations(D) when subjected to analysis of ...

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