Decree of the Ministry of Industry and Trade No. 379 / 2000 Coll.
Decree of the Ministry of Industry and Trade laying down the conditions for determining individual types of crystal glass, their characteristics and methods of marking crystal glass products
Valid
Order
Effective from 01.01.2001
Text versions:
01.01.2001
30.10.2000
379
DECLARATION
Ministry of Industry and Trade
of 10 October 2000
laying down the conditions for determining the different types of crystal glass, their characteristics and methods of marking of crystal glass products
The Ministry of Industry and Trade provides pursuant to § 28a (f) of Act No. 634 / 1992 Coll., on Consumer Protection, as amended by Act No. 104 / 1995 Coll. and Act No. 64 / 2000 Coll.:
(1) The Decree lays down the conditions for determining the different types of crystal glass, including the names of these types, the characteristics characterising them, the symbols and methods of determining the relevant chemical and physical characteristics, as well as the conditions for marking of crystal glass products, including the determination of crystal glass products subject to labelling.
(2) The labelling covers products of individual crystal glass types classified under code number 7013 of the Harmonised System of Tariff Nomenclature (1)
(3) Individual types of crystal glass shall bear the following names:
(a) high lead crystal glass 30% PbO,
(b) lead crystal glass 24% PbO,
(c) crystal crystal glass, or
(d) crystal glass.
(4) The conditions for determining the different types of crystal glass and the way in which they are labelled are set out in Annex 1.
(5) The methods for determining the chemical and physical characteristics of each type of crystal glass are set out in Annex 2.
The species name and symbol referred to in Annex 1 may only be used for individual types of crystal glass if they meet the conditions set out in this Annex.
The names of the types of crystal glass and the symbols listed in Annex 1 may be placed together on a single label.
Where the trade mark, the name of the manufacturer, importer or seller or any other mark or part thereof would be identical or similar to the designation of each type of crystal glass under this Order or could lead to any confusion, both in the offer and in the commercial documentation and in the advertising of such products, it shall be marked before being placed on the market in such a way that:
(a) for each type of crystal glass it was possible to clearly determine whether they complied with the requirements set out in Section 2; and
(b) products which do not comply with the requirements referred to in (a) are not accompanied by the symbol and the name of the type of crystal glass referred to in Annex 1; such product shall be labelled in accordance with its characteristics.
Efficacy
This decree shall take effect on 1 January 2001.
Minister:
Doc.
Příloha č. 1
Annex No 1 to Decree No 379 / 2000 Coll.
Conditions for determining the different types of crystal glass and their labelling
| č. | Druh a název křišťálového skla | Chemické a fyzikální vlastnosti | Označování | Poznámky | ||||
|---|---|---|---|---|---|---|---|---|
| vysvětlivky | oxidy kovů (%) | hustota (g.cm-3) | index lomu | tvrdost povrchu | symbol | |||
| a | b | c | d | e | f | g | h | i |
| 1 | Vysoce olovnaté | Údaj v procentech udává obsah oxidu olovnatého | PbO ≥30% | ≥ 3,00 | x | Kulatá nálepka, barva zlatá průměr ≥1 cm | ||
| 2 | Olovnaté | PbO ≥24% | ≥ 2,90 | x | ||||
| 3 | Údaj v procentech udává hodnotu součtu obsahu oxidů, uvedených ve sloupci d | Jednotlivě nebo v kombinaci ZnO BaO PbO K2O ≥ 10% | ≥ 2,45 | nD ≥1,520 | Čtvercová nálepka, barva stříbrná, délka strany ≥ 1 cm | |||
| 4 | Jednotlivě nebo v kombinaci BaO PbO K2O ≥ 10% | ≥ 2,40 | Vickers — 550 ± 20 | Nálepka ve tvaru rovnostranného trojúhelníku, barva stříbrná, délka strany ≥ 1 cm | ||||
x nD ≥ 1,545 as a criterion for further non-destructive testing (at time of operation)
Příloha č. 2
Annex No 2 to Decree No 379 / 2000 Coll.
METHODS FOR DETERMINING THE CHEMICAL AND PHYSICAL CHARACTERISTICS OF THE SINGLE SPECIES OF CRASHY
1. CHEMICAL ANALYSIS
1.1 BaO and PbO
1.1.1 Determination of BaO + PbO combination
Weigh approximately 0,5 g of finely wiped glass into the platinum bowl to an accuracy of 0,0001 g. Add 10 ml of 15% sulphuric acid solution and 10 ml hydrofluoric acid after moisturizing with water. Then it heats up on the sand bath when white smoke develops. After cooling, add 10 ml of hydrofluoric acid again and warm up until white smoke development begins. Let it cool down, the walls of the bowl rinse with water and warm up when the white smoke develops. After cooling, carefully add 10 ml of water and transfer the contents of the dish into a beaker of 400 ml. Flush the dish several times with 10% sulphuric acid solution and dilute with the same solution to 100 ml. The precipitate solution is cooked for 2 to 3 minutes. It shall then be allowed to stand for at least 12 hours.
The clot is filtered with a filter cup of 4 porosity and washed first with 10% sulphuric acid solution, then twice or three times ethyl alcohol. The precipitate cup is dried for 1 hour in the oven at 150 ° C. BASO4 + PbSO4 shall be considered.
1.1.2 Determination of BaO
Weigh approximately 0,5 g of finely wiped glass into the platinum bowl to an accuracy of 0,0001 g. Add 10 ml of hydrofluoric acid and 5 ml of chlorist acid after moisturizing with water and warm up on the sand bath until white smoke develops.
After cooling, add a further 10 ml of hydrofluoric acid and warm up until the development of white smoke is restored. Let it cool down and rinse the walls with distilled water. It reheats up and evaporates almost dry. Dissolve the evaporator in 50 ml of 10% hydrochloric acid solution and heat carefully to facilitate reconstitution. Transfer the solution into a beaker of 400 ml and dilute with water to 200 ml. It heats up to boiling, and the hydrogen sulfide is flowing through the heat. The hydrogen sulphide supply is terminated as the lead sulphide precipitate drops down to the bottom of the beaker. The clot is filtered through thick filter paper and washed with cold water with saturated sulphide.
The filter is brought to boiling and then, if necessary, its volume is reduced by evaporation to 300 ml. Add 10 ml of 10% sulphuric acid solution to the boiling mixture and remove from the heat source. After at least four hours, the precipitate is filtered through thick filter paper and washed with cold water. The clot is ignited at 1050 ° C and BASO4 is weighed.
1.2 Determination of ZnO
The filter after separation of Bassoon is evaporated to 200 ml. Neutralize with ammonia to methyl red, add 20 ml sulphuric acid c (1 / 2 H2SO4) = 0,1 mol / l [previously 0,1N]. The addition of sulphuric acid c (1 / 2 H2SO4) = 0,1 mol / l [previously 0,1N] or sodium hydroxide (NaOH) = 0,1 mol / l [previously 0,1N], adjust the pH of the solution to 2 for pH control by the metro. A zinc sulphide is precipitated by indicating the hydrogen sulphide stream. After 4 hours of standing, the precipitate is filtered through thick filter paper and washed with cold water with saturated sulphide. Dissolve the clot on the filter by adding 25 ml of a hot 10% hydrochloric acid solution. Wash the filter with boiling water until about 150 ml of the filter is obtained. The filter is neutralized by ammonia into a litmus paper, then added 1 - 2 g of solid urotropin to give the pH of the solution approximately 5. Add a few drops of freshly prepared 0,5% aqueous solution of xylenol orange and titrate with a solution of complex III c (C10H14N2O8Na2.2H2O) = 0,1 mol / l [previously 0,1N] until colour transition from pink to lemon yellow.
1.3 Determination of K2O
K2O is determined by precipitation and weighing as potassium tetraphenylborate.
Weigh to an accuracy of 0,0001 g the platinum dish approximately 2 g of crushed glass, 2 ml of concentrated HNO3 (nitric acid), 15 ml of HClO4 (chlorides) and 25 ml of HF (hydrofluoric acid) are added. It is heated to water and then to sand bath. After the development of dense white smoke in chlorist acid evaporates into dry air. Dissolve the evaporator with 20 ml of hot water and 2-3 ml of concentrated HCl. Transfer the solution to a measuring flask of 200 ml and complete with distilled water to mark.
Reagents: 6% sodium tetraphenylborate solution: dissolve 1,5 g of reagent in 250 ml of distilled water, remove any light opacity by adding 1 g of hydrated alumina. Shake for 5 minutes and filter and filter for the first 20 ml obtained.
Wash solution for precipitate: A small amount of potassium salt is prepared by adding a solution of sodium tetraphenylborate to the solution 0,1 g KCl in 50 ml hydrochloric acid (HCl) = 0,1 mol / l [previously 0,1N] to the solution of sodium tetraphenylborate to the end of the precipitate formation. The clot is filtered on the frit, washed with distilled water and dried in the desiccator at room temperature. Then add 20 - 30 mg of this precipitate to 250 ml of distilled water and mix occasionally. Add 0,5 - 1 g of hydrated alumina after 30 minutes, mix for a few minutes and then filter.
Procedure: The aliquot fraction after acid degradation corresponding to approximately 10 mg K2O is diluted to approximately 100 ml. With a slight mixing, approximately 10 ml of precipitating agent is slowly added to each expected 5 mg K2O. It is allowed to stand for a maximum of 15 minutes, then filtered on a pre-weighed filter cup of porosity 3 or 4. Wash with wash solution and dry for 30 minutes at 120 ° C. The conversion factor for K2O is 0,13143.
1.4. Tolerances
1.4.1. For the determination of any component, the tolerance is ± 0,1 absolute value.
1.4.2. If the analysis provides, within the tolerances allowed, a value below the fixed limit (30, 24 or 10%), an average of at least 3 analyses shall be calculated. If this diameter is greater than or equal to 29,95, the glass shall be classified in the category corresponding to 30%, if it is greater than or equal to 23,95, the glass shall be classified in the category corresponding to 24% and if it is greater than or equal to 9,95, the glass shall be classified in the category corresponding to 10%.
1.5 Other methods of chemical analysis
Other appropriate analytical methods may also be used for chemical analyses of crystal glass if they can be proven to meet the accuracy and accuracy requirements of the determination results defined in accordance with paragraph 1.4.1. When using multiple measurement methods, or in the case of a question of measurement according to the first sentence, the decisive result is the one obtained using the methods referred to in points 1.1 to 1.3.
2. Determination of PHYSICAL PROPERTIES
2.1. Density
Determine the hydrostatic weighing method with an accuracy of ± 0,01. A sample weighing not less than 20 g shall be weighed in the air and then weighed in distilled water at 20 ° C.
2.2. Fracture index
The index shall be measured with a refractometer to an accuracy of ± 0,001.
2.3 Microhardness
It shall be determined by testing the hardness according to Vickers with a load of 50 g. The mean of 15 determinations is taken as a result.
1) Decree of the Minister for Foreign Affairs No. 160 / 1988 Coll., concerning the International Convention on the Harmonised Commodity Description and Coding System and the Protocol on its Amendment. § 56 et seq. of Act No. 13 / 1993 Coll., Customs Act. Decree No. 318 / 1999 Coll., implementing the Customs Tariff.
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Regulation Information
| Citation | Decree of the Ministry of Industry and Trade No. 379 / 2000 Coll., laying down the conditions for determining individual types of crystal glass, their characteristics and methods of marking of crystal glass products |
|---|---|
| Regulation Type | Order |
| Author | - |
| Collection | Code of Laws |
| Date of Promulgation | 30.10.2000 |
|---|---|
| Effective from | 01.01.2001 |
| Effective until | - |
| Status | Valid |
The regulation text is for informational purposes only.
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