WO2018138610A1 - Method for manufacturing ruby red opaque lead glass and coloured glass thereof - Google Patents

Method for manufacturing ruby red opaque lead glass and coloured glass thereof Download PDF

Info

Publication number
WO2018138610A1
WO2018138610A1 PCT/IB2018/050338 IB2018050338W WO2018138610A1 WO 2018138610 A1 WO2018138610 A1 WO 2018138610A1 IB 2018050338 W IB2018050338 W IB 2018050338W WO 2018138610 A1 WO2018138610 A1 WO 2018138610A1
Authority
WO
WIPO (PCT)
Prior art keywords
weight
oxide
glass
colouring composition
composition
Prior art date
Application number
PCT/IB2018/050338
Other languages
French (fr)
Inventor
Vinod Kumar Jain
Original Assignee
Vinod Kumar Jain
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vinod Kumar Jain filed Critical Vinod Kumar Jain
Publication of WO2018138610A1 publication Critical patent/WO2018138610A1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C4/00—Compositions for glass with special properties
    • C03C4/02—Compositions for glass with special properties for coloured glass
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
    • C03C3/072—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron

Definitions

  • the present invention relates to a method for manufacturing coloured glass and coloured glass thereof. More particularly, the present invention relates to method for manufacturing ruby red (dark pink) coloured lead based glass and Ruby red coloured lead based glass thereof.
  • a base material for Si02 can be, for example tetraethyl orthosilicate and the base materials for adding further glasscomponents, such as B2O 3 , AI2O 3 , Na 2 0 or P2O5, can be boric acid trimethyl ester, aluminium triisopropylate, sodium methylate, zinc-2,4- pentanedionat, tributyl phosphate, or other alkoxides.
  • a disadvantage with such glasses based on Si(3 ⁇ 4 is that the glass has less density and shine. Accordingly, a need exist for providing a method for manufacturing a glass that has high density has more shine in comparison to the existing glasses. It is required to manufacture a glass that is typical ruby red (dark pink) in colour.
  • a colouring composition for a coloured glass comprises:
  • Si0 2 Silicon Dioxide
  • MgO Magnesium Oxide
  • Aluminium Oxide (A1 2 0 3 );
  • Iron Oxide Fe 2 0 3
  • Arsenic Oxide (As 2 0 3 );
  • the colouring composition comprises:
  • Si0 2 Silicon Dioxide
  • Sodium Tetraborate Na 2 B/ t 0 7
  • Tin Oxide Sn0 2
  • Aluminium Oxide (A1 2 0 3 );
  • Iron Oxide Fe 2 0 3
  • Arsenic Oxide (As 2 0 3 );
  • a glazing pane comprising a coloured glass sheet, wherein the coloured glass sheet has a composition as stated above.
  • An object of the present invention is to provide a glass composition that result in anruby red (dark pink) coloured glass.
  • Another object is to provide a composition those results in glass having high density in comparison to the existing glasses.
  • a colouring composition for a coloured glass comprises:
  • Si0 2 Silicon Dioxide
  • Tin Oxide Sn0 2
  • MgO Magnesium Oxide
  • Aluminium Oxide (A1 2 0 3 ); 0.001-0.004% by weight of Copper (II) Oxide (CuO);
  • Iron Oxide Fe 2 0 3
  • Arsenic Oxide (As 2 0 3 );
  • the colouring composition comprises:
  • Si0 2 Silicon Dioxide
  • Tin Oxide Sn0 2
  • Aluminium Oxide (A1 2 0 3 );
  • Iron Oxide Fe 2 0 3
  • Arsenic Oxide (As 2 0 3 );
  • a process to manufacture glass in accordance with the invention is provided.
  • Glass is produced in a two-step process, and then shaped to make it suitable for a variety of applications.
  • the first step is batch mixing.
  • batch mixing the mixture of ingredients to make up the glass, together with small quantities of various other minor ingredients) are mixed in a rotary mixer to ensure an even mix of ingredients and fed into the furnace.
  • the mixture of ingredients to make up the glass are known as major primary mixtures and the others are referred to as secondary minor mixtures.
  • the primary major ingredients are listed below along with their weight percentage:
  • Si0 2 Silicon Dioxide
  • the secondary minor ingredients are listed below along with their weight percentage:
  • Tin Oxide Sn0 2
  • Iron Oxide Fe 2 0 3
  • Arsenic Oxide (As 2 0 3 );
  • K2O Potassium Oxide
  • Glass is made of different ingredients in differing proportions depending on the desired end product, but most glass (except for some specialist glass) consists of all the "majors" mixed with small quantities of some of the minors.
  • the minors are weighed first in a special weighing hopper, and added to the majors with a little water. Water is necessary as in a very dry mix the fines can blow off the batch as it enters the furnace and clog up the furnace flues.
  • the two tonne batch is then mixed for between two and three minutes in a rotary mixer, before being transported to a batch hopper, from which it is slowly fed into a furnace.
  • the secondary minor ingredients act as colouring agents and their weight percentage determines the colour of the final product. Colour results from two factors: the oxidation state of the glass, and the specific colourant additives used. Glass oxidation is promoted by the addition of carbon, and the degree of oxidation is measured on an arbitrary scale known as the carbon number. Clear glass has a carbon number of zero, dark green glass is -28 and amber is -52. Other variations of colour are achieved through the action of coloured materials that act as dyes. In the present case, mixture of Gold (III) Chloride (AUCI 3 ), Tin Oxide, Magnesium Oxide when mixed in appropriate weight percentage as stated previously result in a unique ruby red colour. As glass is fed continuously into the furnaces, each furnace has to be dedicated to producing glass of a particular recipe, and it takes 12-48 hours and a number of steps to alter the mix to change to producing a different type of glass of an acceptable standard.
  • the next step after mixing the ingredients and putting the mixture in the furnace involves heating the mixture to 1100-1550 degrees C, where the ingredients melt and various chemical reactions take place and C0 2 and SO 3 are evolved.
  • the ingredients mixture is fed continuously into a furnace fired by natural gas, boosted by electricity when necessary.
  • the glass is initially heated to 1100 degrees C, then raised to 1550 degrees C, at which temperature the mixture melts.
  • the glass is then held above 1400 degrees C while it is refined and CO 2 and SO 3 are evolved. When no more gases are evolved the liquid is ready to be formed into the desired endproduct.
  • the furnaces are kept at these precise temperatures by a cross-fired system which reduces heat loss and promotes a more even heat distribution in the molten glass.
  • the molten glass is cooled and shaped into appropriate size and thickness.
  • the advantage of using lead oxide is that it produces more shine and increases the density of the resultant glass.
  • the colouring composition as defined above includes one or more of Gold (III) Chloride Tin Oxide, Magnesium Oxide (combined under reducing conditions) acting as colouring agents.
  • the aforesaid composition results in a ruby red (dark pink) coloured glass.
  • one or more of calcium oxide, antimony trioxide and arsenic oxide are used for enhancing the opaque properties of the glass.
  • the colouring composition may be in powder form, or in the form of pellets, tablets or granules.
  • the process of forming the granules include providing a composition in accordance with the invention and humidifying the same. Thereafter, the process involves reducing the composition into granules, humidifying the colorant granules; and drying the granules.
  • the humidification step is carried out in an atmosphere comprising from 15 to 35% by weight of water, preferably from 20 to 30% by weight of water.
  • a granule of the colouring composition in accordance with the invention has a density which ranges from 4 to 8 g/cm3, preferably between 6 and 8 g/cm3, a size which ranges between 1 and 15 mm, preferably between 2 and 10 mm and a humidity of less than 5% w/w, preferably less than 3% w/w.
  • a glazing pane comprising a coloured glass sheet having the composition as stated above is provided.
  • the colouring composition includes at least one of Tin oxide, Calcium oxide, Arsenic oxide for varying the opaque characteristics of glass formed using the colouring compositionA
  • the glass prepared using the above composition is ruby red in colour and it is opaque in character and generally used, but not limited to, for jewellery and decorative items. However, it is to be noted that the glass produced using the above composition may be used for other purposes as well. Further, slight colour variation and opacity resulting from varying the percentage of the ingredients are within the scope of the invention.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)

Abstract

In an embodiment, a colouring composition for a coloured glass is provided. The colouring composition comprises: 65% by weight of Lead Oxide (Pb3O4); 25.5% by weight of Silicon Dioxide (SiO2); 7% by weight of Sodium Tetraborate (Na2B4O7); 2% by weight of Tin Oxide (SnO2); 2% by weight of Magnesium Oxide (MgO);0.02% by weight of Gold (III) Chloride (AuCl3) 0.3% by weight of Aluminium Oxide (Al2O3); 0.003% by weight of Copper (II) Oxide (CuO); 0.05% by weight of Iron Oxide (Fe2O3); 0.05% by weight of Calcium Oxide (CaO); 0.003% by weight of Arsenic Oxide (As2O3); 0.1% by weight of Potassium Oxide (K2O).

Description

FIELD OF THE INVENTION
The present invention relates to a method for manufacturing coloured glass and coloured glass thereof. More particularly, the present invention relates to method for manufacturing ruby red (dark pink) coloured lead based glass and Ruby red coloured lead based glass thereof.
BACKGROUND OF THE INVENTION
Essentially two methods for manufacturing glasses by means of a sintering process are known by those conversant with current state ofthe art technology: the sol-gel process anda method employing powder technology.
One method that can be employed to produce glass by means of a sol-gel process is described in U.S. Pat. No.4,432,956. However, this patent only describes the production of silica glass manufactured at temperatures of 1300-1500° C.
In order to include further components in glass synthesis one can avail oneself of methods such as those described in patents DE 4129409 Al, EP 0233732 Al and U.S. Pat. No. 5,091,115. All these methods are based on silicon alkoxides such as tetraethyl orthosilicate (TEOS) and other soluble compounds that as a rule are processed using alcoholic solvents. A base material for Si02 can be, for example tetraethyl orthosilicate and the base materials for adding further glasscomponents, such as B2O3, AI2O3, Na20 or P2O5, can be boric acid trimethyl ester, aluminium triisopropylate, sodium methylate, zinc-2,4- pentanedionat, tributyl phosphate, or other alkoxides. A disadvantage with such glasses based on Si(¾ is that the glass has less density and shine. Accordingly, a need exist for providing a method for manufacturing a glass that has high density has more shine in comparison to the existing glasses. It is required to manufacture a glass that is typical ruby red (dark pink) in colour.
SUMMARY OF THE INVENTION:
In an embodiment, a colouring composition for a coloured glass is provided. The colouring composition comprises:
50-70% by weight of Lead Oxide (Pb304);
20-40% by weight of Silicon Dioxide (Si02);
3-10% by weight of Sodium Tetraborate (Na2B/t07);
1 -4% by weighs of Tin Oxide iS nOv);
1-4% by weight of Magnesium Oxide (MgO);
0.01-0.10% by weight of Gold(III) Chloride (AuCl3)
0.01-0.08% by weight of Aluminium Oxide (A1203);
0.001-0.004% by weight of Copper (II) Oxide (CuO);
0.02-0.05% by weight of Iron Oxide (Fe203);
0.02-0.07% by weight of Calcium Oxide (CaO);
0.002-0.004% by weight of Arsenic Oxide (As203); and
0.05-1.2% by weight of Potassium Oxide (K20).
In the preferred embodiment, the colouring composition comprises:
65% by weight of Lead Oxide (Pb304);
25.5% by weight of Silicon Dioxide (Si02); 7% by weight of Sodium Tetraborate (Na2B/t07);
2% by weight of Tin Oxide (Sn02);
2% by weight of Magnesium Oxide (MgO);
0.02% by weight of Gold (III) Chloride (AuCl3)
0.03% by weight of Aluminium Oxide (A1203);
0.003% by weight of Copper (II) Oxide (CuO);
0.02-0.05% by weight of Iron Oxide (Fe203);
0.05% by weight of Calcium Oxide (CaO);
0.003% by weight of Arsenic Oxide (As203);
0.1% by weight of Potassium Oxide (K20).
In another embodiment, a glazing pane comprising a coloured glass sheet, wherein the coloured glass sheet has a composition as stated above.
A process of manufacturing a glass having the composition as stated above.
An object of the present invention is to provide a glass composition that result in anruby red (dark pink) coloured glass.
Another object is to provide a composition those results in glass having high density in comparison to the existing glasses.
To further clarify advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof, which is illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. The invention will be described and explained with additional specificity and detail with the accompanying drawings.
Detailed Description:
For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated system, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates.
It will be understood by those skilled in the art that the foregoing general description and the following detailed description are exemplary and explanatory of the invention and are not intended to be restrictive thereof.
Reference throughout this specification to "an aspect", "another aspect" or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, appearances of the phrase "in an embodiment", "in another embodiment" and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment. The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of steps does not include only those steps but may include other steps not expressly listed or inherent to such process or method. Similarly, one or more devices or sub-systems or elements or structures or components proceeded by "comprises... a" does not, without more constraints, preclude the existence of other devices or other sub-systems or other elements or other structures or other components or additional devices or additional sub-systems or additional elements or additional structures or additional components.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The system, methods, and examples provided herein are illustrative only and not intended to be limiting.
Embodiments of the present invention will be described below in detail.
In an embodiment, a colouring composition for a coloured glass is provided. The colouring composition comprises:
50-70% by weight of Lead Oxide (Pb304);
20-40% by weight of Silicon Dioxide (Si02);
3-10% by weight of Sodium Tetraborate (Na2B/t07);
1-4% by weight of Tin Oxide (Sn02);
1-4% by weight of Magnesium Oxide (MgO);
0.01-0.10% by weight of Gold (III) Chloride (AuCl3)
0.01-0.08% by weight of Aluminium Oxide (A1203); 0.001-0.004% by weight of Copper (II) Oxide (CuO);
0.02-0.07% by weight of Iron Oxide (Fe203);
0.02-0.05% by weight of Calcium Oxide (CaO);
0.002-0.004% by weight of Arsenic Oxide (As203);
0.05-1.2% by weight of Potassium Oxide (K20).
In the preferred embodiment, the colouring composition comprises:
65% by weight of Lead Oxide (Pb304);
25.5% by weight of Silicon Dioxide (Si02);
7% by weight of Sodium Tetraborate (Na2B/t07);
2% by weight of Tin Oxide (Sn02);
2% by weight of Magnesium Oxide (MgO);
0.02% by weight of Gold (III) Chloride (AuCl3)
0.3% by weight of Aluminium Oxide (A1203);
0.003% by weight of Copper (II) Oxide (CuO);
0.05% by weight of Iron Oxide (Fe203);
0.05% by weight of Calcium Oxide (CaO);
0.003% by weight of Arsenic Oxide (As203);
0.1% by weight of Potassium Oxide (K20).
In an embodiment, a process to manufacture glass in accordance with the invention is provided. Glass is produced in a two-step process, and then shaped to make it suitable for a variety of applications. The first step is batch mixing. In batch mixing the mixture of ingredients to make up the glass, together with small quantities of various other minor ingredients) are mixed in a rotary mixer to ensure an even mix of ingredients and fed into the furnace. In the present case, the mixture of ingredients to make up the glass are known as major primary mixtures and the others are referred to as secondary minor mixtures. In the present invention, the primary major ingredients are listed below along with their weight percentage:
65% by weight of Lead Oxide (Pb304);
25.5% by weight of Silicon Dioxide (Si02);
7% by weight of Sodium Tetraborate (Na2B/t07);
The secondary minor ingredients are listed below along with their weight percentage:
2% by weight of Tin Oxide (Sn02);
2% by weight of Magnesium Oxide (MgO);
0.02% by weight of Gold (III) Chloride (AuCl3)
0.3% by weight of Aluminium Oxide (AI2O3);
0.003% by weight of Copper (II) Oxide (CuO);
0.05% by weight of Iron Oxide (Fe203);
0.05% by weight of Calcium Oxide (CaO);
0.003% by weight of Arsenic Oxide (As203);
0.1% by weight of Potassium Oxide (K2O).
Glass is made of different ingredients in differing proportions depending on the desired end product, but most glass (except for some specialist glass) consists of all the "majors" mixed with small quantities of some of the minors. Thus the minors are weighed first in a special weighing hopper, and added to the majors with a little water. Water is necessary as in a very dry mix the fines can blow off the batch as it enters the furnace and clog up the furnace flues. The two tonne batch is then mixed for between two and three minutes in a rotary mixer, before being transported to a batch hopper, from which it is slowly fed into a furnace.
In the present case, the secondary minor ingredients act as colouring agents and their weight percentage determines the colour of the final product. Colour results from two factors: the oxidation state of the glass, and the specific colourant additives used. Glass oxidation is promoted by the addition of carbon, and the degree of oxidation is measured on an arbitrary scale known as the carbon number. Clear glass has a carbon number of zero, dark green glass is -28 and amber is -52. Other variations of colour are achieved through the action of coloured materials that act as dyes. In the present case, mixture of Gold (III) Chloride (AUCI3), Tin Oxide, Magnesium Oxide when mixed in appropriate weight percentage as stated previously result in a unique ruby red colour. As glass is fed continuously into the furnaces, each furnace has to be dedicated to producing glass of a particular recipe, and it takes 12-48 hours and a number of steps to alter the mix to change to producing a different type of glass of an acceptable standard.
The next step after mixing the ingredients and putting the mixture in the furnace involves heating the mixture to 1100-1550 degrees C, where the ingredients melt and various chemical reactions take place and C02and SO3 are evolved. The ingredients mixture is fed continuously into a furnace fired by natural gas, boosted by electricity when necessary. The glass is initially heated to 1100 degrees C, then raised to 1550 degrees C, at which temperature the mixture melts. The glass is then held above 1400 degrees C while it is refined and CO2 and SO3 are evolved. When no more gases are evolved the liquid is ready to be formed into the desired endproduct. The furnaces are kept at these precise temperatures by a cross-fired system which reduces heat loss and promotes a more even heat distribution in the molten glass.
Thereafter, the molten glass is cooled and shaped into appropriate size and thickness.
The advantage of using lead oxide is that it produces more shine and increases the density of the resultant glass. The colouring composition as defined above includes one or more of Gold (III) Chloride Tin Oxide, Magnesium Oxide (combined under reducing conditions) acting as colouring agents. The aforesaid composition results in a ruby red (dark pink) coloured glass. It is to be noted that one or more of calcium oxide, antimony trioxide and arsenic oxide are used for enhancing the opaque properties of the glass.
In an embodiment, the colouring composition may be in powder form, or in the form of pellets, tablets or granules. In an embodiment, the process of forming the granules include providing a composition in accordance with the invention and humidifying the same. Thereafter, the process involves reducing the composition into granules, humidifying the colorant granules; and drying the granules. The humidification step is carried out in an atmosphere comprising from 15 to 35% by weight of water, preferably from 20 to 30% by weight of water.
In an embodiment, a granule of the colouring composition in accordance with the invention has a density which ranges from 4 to 8 g/cm3, preferably between 6 and 8 g/cm3, a size which ranges between 1 and 15 mm, preferably between 2 and 10 mm and a humidity of less than 5% w/w, preferably less than 3% w/w. In another embodiment, a glazing pane comprising a coloured glass sheet having the composition as stated above is provided.
In another embodiment, the colouring composition includes at least one of Tin oxide, Calcium oxide, Arsenic oxide for varying the opaque characteristics of glass formed using the colouring compositionA
The glass prepared using the above composition is ruby red in colour and it is opaque in character and generally used, but not limited to, for jewellery and decorative items. However, it is to be noted that the glass produced using the above composition may be used for other purposes as well. Further, slight colour variation and opacity resulting from varying the percentage of the ingredients are within the scope of the invention.
The forgoing description gives examples of embodiments. Those skilled in the art will appreciate that one or more of the described elements may well be combined into a single functional element. Alternatively, certain elements may be split into multiple functional elements. Elements from one embodiment may be added to another embodiment. For example, orders of processes described herein may be changed and are not limited to the manner described herein. Moreover, the actions of any flow diagram need not be implemented in the order shown; nor do all of the acts necessarily need to be performed. Also, those acts that are not dependent on other acts may be performed in parallel with the other acts. The scope of embodiments is by no means limited by these specific examples. Numerous variations, whether explicitly given in the specification or not, such as differences in structure, dimension, and use of material, are possible. Benefits, other advantages, and solutions to problems have been described above with regard to specific embodiments. However, the benefits, advantages, solutions to problems, andany component(s) that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as a critical, required, or essential feature.

Claims

I claim:
1. A colouring composition for a coloured glass, comprising:
50-70% by weight of Lead Oxide (Pb304);
20-40% by weight of Silicon Dioxide (Si02);
3-10% by weight of Sodium Tetraborate (Na2B407);
1-4% by weight of Tin Oxide (Sn02);
1-4% by weight of Magnesium Oxide (MgO);
0.01-0.10% by weight of Gold(III) Chloride (AuCl3)
0.01-0.08% by weight of Aluminium Oxide (A1203);
0.001-0.004% by weight of Copper (II) Oxide (CuO);
0.02-0.05% by weight of Iron Oxide (Fe203);
0.02-0.07% by weight of Calcium Oxide (CaO);
0.002-0.004% by weight of Arsenic Oxide (As203); and
0.05-1.2% by weight of Potassium Oxide (K20).
2. The colouring composition as claimed in claim 1 , wherein colouring composition comprises:
65% by weight of Lead Oxide (Pb304);
25.5% by weight of Silicon Dioxide (Si02);
7% by weight of Sodium Tetr aborate (Na2B407);
2% by weight of Tin Oxide (Sn02);
2% by weight of Magnesium Oxide (MgO);
0.02% by weight of Gold (III) Chloride (AuCl3)
0.03% by weight of Aluminium Oxide (A1203);
0.003% by weight of Copper (II) Oxide (CuO);
0.02-0.05% by weight of Iron Oxide (Fe203);
0.05% by weight of Calcium Oxide (CaO);
0.003% by weight of Arsenic Oxide (AS2O3); and
0.1% by weight of Potassium Oxide (K2O).
3. The colouring composition as claimed in any one of the preceding claims, wherein one or more of Gold (III) Chloride Tin Oxide, Magnesium Oxide (combined under reducing conditions) acting as colouring agents.
4. The colouring composition as claimed in any one of the preceding claims, wherein one or calcium oxide, antimony trioxide and arsenic oxide acts as opaqueness enhancers.
5. The colouring composition as claimed in any one of the preceding claims, wherein colouring composition is in powder form, or in the form of pellets, tablets or granules.
6. The colouring composition as claimed in any one of the preceding claims, wherein a granule of the colouring composition as claimed in any one of the preceding claims has a density which ranges from 4to 8 g/cm3, preferably between 6 and 8 g/cm3, a size which ranges between 1 and 15 mm, preferably between 2 and 10 mm and a humidity of less than 5% w/w, preferably less than 3% w/w.
7. The colouring composition as claimed in any one of the preceding claims, wherein the colouring composition produces a ruby red coloured glass. A glazing pane comprising a coloured glass sheet, wherein the coloured glass sheet has a composition as claimed in any of the preceding claims.
A process of manufacturing a glass having the composition as claimed in claims 1-8.
PCT/IB2018/050338 2017-01-25 2018-01-19 Method for manufacturing ruby red opaque lead glass and coloured glass thereof WO2018138610A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN201641033843 2017-01-25
IN201641033843 2017-01-25

Publications (1)

Publication Number Publication Date
WO2018138610A1 true WO2018138610A1 (en) 2018-08-02

Family

ID=62979298

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2018/050338 WO2018138610A1 (en) 2017-01-25 2018-01-19 Method for manufacturing ruby red opaque lead glass and coloured glass thereof

Country Status (1)

Country Link
WO (1) WO2018138610A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ302143B6 (en) * 2009-07-09 2010-11-10 Moravské sklárny Kvetná s.r.o. Gold-colored ruby-red glass
EP2134660B1 (en) * 2007-03-28 2016-11-02 Pilkington Group Limited Glass composition

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2134660B1 (en) * 2007-03-28 2016-11-02 Pilkington Group Limited Glass composition
CZ302143B6 (en) * 2009-07-09 2010-11-10 Moravské sklárny Kvetná s.r.o. Gold-colored ruby-red glass

Similar Documents

Publication Publication Date Title
CN1332901C (en) Optical glass, shapable glass material for press-shaping, optical element and process for producing optical element
CN102503122B (en) Leadless, cadmium-free and strontium-free glass and manufacture process thereof
US20140356608A1 (en) Method for producing glasses, glass ceramics and the use thereof
US3300323A (en) Gray glass composition
CN106746595A (en) A kind of borosilicate glass glass fining agent high and its preparation method and application
CN102295413B (en) Preparation method of Zr-P fluoride-free opaque glass
CN110255895A (en) Containing alkali borosilicate glass and preparation method thereof
CN109336380B (en) Super white glass and its production method and special equipment
CN107438586A (en) Glass precursor gel
CN1974456B (en) Microcrystalline glass plate production process
US20080103039A1 (en) Glass frit with iron selenide complex
US3513003A (en) Heat reactive colored glass and process
US3326702A (en) Colored glasses and process of manufacture
CN105399330B (en) A kind of titanium white fritted glaze and preparation method thereof
CA2118737C (en) Selenium encapsulation for producing colored glass
CN101823841B (en) Colored decorating plate made of composite fly ash microcrystalline glass and preparation method thereof
US6191059B1 (en) Metal silicides as performance modifiers for glass compositions
US3627548A (en) Dark amber glasses and process
JP5075711B2 (en) Amber glass composition and method for producing amber glass
CN104909562A (en) High-refractivity environment-friendly ruby glass and preparation method thereof
WO2018138610A1 (en) Method for manufacturing ruby red opaque lead glass and coloured glass thereof
CN100381382C (en) Method for preparing pre-reacted raw material batches for the production of glass formulae
US3928050A (en) Colored glass compositions
CN105967505A (en) Formula of quartz glass plates and preparation technology thereof
Meechoowas et al. Alternative soda-lime glass batch to reduce energy consumption

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18744472

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18744472

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 17.12.2019)

122 Ep: pct application non-entry in european phase

Ref document number: 18744472

Country of ref document: EP

Kind code of ref document: A1