KR830000414B1 - Color water pipe fluorescent surface formation method - Google Patents
Color water pipe fluorescent surface formation method Download PDFInfo
- Publication number
- KR830000414B1 KR830000414B1 KR1019790002827A KR790002827A KR830000414B1 KR 830000414 B1 KR830000414 B1 KR 830000414B1 KR 1019790002827 A KR1019790002827 A KR 1019790002827A KR 790002827 A KR790002827 A KR 790002827A KR 830000414 B1 KR830000414 B1 KR 830000414B1
- Authority
- KR
- South Korea
- Prior art keywords
- formation method
- fluorescent surface
- surface formation
- photosensitive resin
- water pipe
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 14
- 230000015572 biosynthetic process Effects 0.000 title claims 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 14
- 229920005989 resin Polymers 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 9
- 239000012954 diazonium Substances 0.000 claims description 5
- 150000001989 diazonium salts Chemical class 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 description 9
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 8
- DNIAPMSPPWPWGF-UHFFFAOYSA-N monopropylene glycol Natural products CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 5
- -1 Alginate propylene glycol ester Chemical class 0.000 description 4
- 235000005074 zinc chloride Nutrition 0.000 description 4
- 239000011592 zinc chloride Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229940072056 alginate Drugs 0.000 description 3
- 235000010443 alginic acid Nutrition 0.000 description 3
- 229920000615 alginic acid Polymers 0.000 description 3
- JOSWYUNQBRPBDN-UHFFFAOYSA-P ammonium dichromate Chemical compound [NH4+].[NH4+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O JOSWYUNQBRPBDN-UHFFFAOYSA-P 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- FMMWERGDNQQYOP-UHFFFAOYSA-M 2-(dimethylamino)benzenediazonium;zinc;chloride Chemical compound [Cl-].[Zn].CN(C)C1=CC=CC=C1[N+]#N FMMWERGDNQQYOP-UHFFFAOYSA-M 0.000 description 1
- RUMACXVDVNRZJZ-UHFFFAOYSA-N 2-methylpropyl 2-methylprop-2-enoate Chemical compound CC(C)COC(=O)C(C)=C RUMACXVDVNRZJZ-UHFFFAOYSA-N 0.000 description 1
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 1
- HDSBZMRLPLPFLQ-UHFFFAOYSA-N Propylene glycol alginate Chemical compound OC1C(O)C(OC)OC(C(O)=O)C1OC1C(O)C(O)C(C)C(C(=O)OCC(C)O)O1 HDSBZMRLPLPFLQ-UHFFFAOYSA-N 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- CIZVQWNPBGYCGK-UHFFFAOYSA-N benzenediazonium Chemical class N#[N+]C1=CC=CC=C1 CIZVQWNPBGYCGK-UHFFFAOYSA-N 0.000 description 1
- CLRSZXHOSMKUIB-UHFFFAOYSA-M benzenediazonium chloride Chemical compound [Cl-].N#[N+]C1=CC=CC=C1 CLRSZXHOSMKUIB-UHFFFAOYSA-M 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 235000010409 propane-1,2-diol alginate Nutrition 0.000 description 1
- 239000000770 propane-1,2-diol alginate Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
- H01J9/22—Applying luminescent coatings
- H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Abstract
내용 없음.No content.
Description
본 발명은 형광체를 분말상태에서 패이스패널에 도포하는 소위 드라이프로세스에 위한 칼러수상관 형광면 형성법의 개량에 관한 것이다.The present invention relates to an improvement of the color water-based fluorescent surface forming method for a so-called dry process in which a phosphor is applied to a face panel in a powder state.
컬러수상관의 형광면은 화면의 각 회소를 각각 3원색의 형광체를 발광시켜 표현하기 위하여 각각 소정개소에 정확하게 도트(dot)상 또는 스트라이프상(stripe 狀)으로 도포된 각색 형광체막으로 형성되며 그 도포법으로서는 감광성 물질막을 도포하고 있는 패이스패널내면의 소정색 형광체가 도포되는 소망하는 개소를 샤도우마스크를 개재하여 로광시켜 그 곳에 발생하는 광반응을 이용한 방법이 사용되고 있는 것은 공지한 바와 같다.The fluorescent surface of the color receiving tube is formed of an individual phosphor film coated in a dot or stripe on a predetermined point to express each element of the screen by emitting phosphors of three primary colors. As a method, it is well-known that the method using the photoreaction which generate | occur | produces the desired location in which the predetermined | prescribed color fluorescent substance on the inner surface of the face panel on which the photosensitive material film is apply | coated through a shadow mask is produced.
패이스패널의 내면에 디아조늄염을 주체로 하는 감광성수지막을 도포하여 이 막의 형광체가 도포를 소망하는 개소를 로광시키면 광반응에 의해 로광개소에 발생한 염화아연이 대기중의 수분을 흡수하여 점착성(粘着性)을 나타내기 때문에 패이스패널의 내면에 소정의 발광색 형광체 분말을 불어 붙이면 감광성수지막 표면의 점착성을 나타내고 있는 개소에만 형광체 분말이 부착하여 도포된다. 이 형광체 분말의 불어 붙임과 점착도포의 공정을 3원색 형광체 각각에 관하여 행한후 감광성수지막의 표면에 암모니아가스를 작용시켜 형광체 분말이 점착 도포되어 있는 개소의 감광성 수지막을 물에 불A photosensitive resin film mainly containing diazonium salt is applied to the inner surface of the face panel, and the fluorescent material of this film is turned into a desired place. When zinc chloride generated at the photoreaction site is absorbed by the photoreaction, it absorbs moisture in the air. Therefore, when a predetermined light emitting color phosphor powder is blown onto the inner surface of the face panel, the phosphor powder is applied and applied only to a portion showing the adhesiveness on the surface of the photosensitive resin film. After blowing the phosphor powder and applying the pressure-sensitive adhesive coating to each of the three primary color phosphors, ammonia gas is applied to the surface of the photosensitive resin film and the photosensitive resin film of the place where the phosphor powder is adhesively applied is blown into water.
본 발명은 상기한 종래의 방법에서 필요로 했던 암모니아가스에 의한 정착공정도 불필요한 짧은 공정의 칼러수상관 형광면 형성법을 제공하는 것을 목적으로 한다.An object of the present invention is to provide a method for forming a color water pipe fluorescent surface in a short process, which is also unnecessary in the fixing step by ammonia gas required in the above-described conventional method.
상기의 목적을 달성하기 위하여 본 발명에 있어서는 디아조늄염을 주체로 하는 감광성수지에 미리 소량의 감광성 접착제 예컨대, 무기의 중크롬산 암모늄, 유기의 디아조수지, 염화벤젠 디아조늄염 등을 혼입한 것을 패이스패널의 내면에 도포하여 막을 이루어 이 막의 로광개소에서는 광반응에 따라 디아조늄염의 분해에 수반하는 점착성과, 수지와 결착제(結着劑)의 가고(架稿)결합에 수반하는 물에 대한 불용성이 동시에 발생하도록 했다. 그 결과 종래의 암모니아가스에 의한 정착공정은 불필요하게 되고, 또 감광성 수지와 감광성 접착제와의 광에 의한 가교반응은 그 부분에 점착도포된 형광체 분말을 물, 유기용매, 무기화합물용액등에 대한 세정에도 견뎌내어 패이스패널면에 부착시켜져 있을만큼 견고하기 때문에 3색 형광체의 점착도포후의 세정을 충분하게 행할 수 있어 불필요한 반응생성물은 물론 타색부분에 혼입(混入)존재하여 있던 형광체 분말의In order to achieve the above object, in the present invention, a mixture of a small amount of a photosensitive adhesive such as an inorganic ammonium dichromate, an organic diazo resin, a benzene diazonium salt, or the like into a photosensitive resin mainly composed of a diazonium salt is used as a face. It is coated on the inner surface of the panel to form a film, and in the furnace light spot of this film, the adhesiveness accompanying the decomposition of the diazonium salt due to the photoreaction, and the insoluble in water accompanying the thin bond of the resin and the binder. This occurred at the same time. As a result, the conventional fixing process using ammonia gas is unnecessary, and the crosslinking reaction by the light of the photosensitive resin and the photosensitive adhesive can be used to clean the phosphor powder coated on the portion with water, organic solvent, inorganic compound solution, etc. It is strong enough to endure and adheres to the surface of the face panel, so that the three-color phosphors can be thoroughly cleaned after the adhesive coating, so that not only the unnecessary reaction product but also the phosphor powders present in the other color parts
이하 실시예에 관해 더욱 상세하게 설명한다.Examples will be described in more detail below.
[실시예]EXAMPLE
다음에 나타낸 바와 같은 조성의 감광성의 수지와 결착제의 혼합물을 14형칼러수상관의 패이스패널의 내면에 0.6~1.0㎛의 두께로 균일하게 도포하여 건조한 후 샤도우마스크를 패이스패널에 조합하여 샤도우 마스크를 개재하여 15~20W/㎡의 강도의 광으로 2~3분간 녹(綠)형광체를 도포해야 할 개소를 조사(照射)로광한다. 이 조작에 의해 혼합물 도포막의 로광개소에서는 디아조늄염이 분해하여 염화아연이 생성되어 염화아연이 공기중의 수분을 흡착하여 점착성이 발생한다.The mixture of photosensitive resin and binder having the composition as shown below is uniformly applied to the inner surface of the face panel of the 14-inch color water pipe with a thickness of 0.6 to 1.0 μm and dried, and then the shadow mask is combined with the face panel to provide a shadow mask. The light to be applied to the green phosphor for 2 to 3 minutes is irradiated with light having an intensity of 15 to 20 W / m 2 through. By this operation, the diazonium salt decomposes and zinc chloride produces | generates in the furnace light location of a mixture coating film, and zinc chloride adsorbs the moisture in air, and adhesiveness arises.
이때의 분위기는 25±5℃, 55±6% 전후의 온도, 순도가 적당하다. 여기서 녹형광체 분말을 불어붙인 후 에어스프레이하면 로광하여 막에 점착성이 발생하여 있는 개소에만 형광체가 2.5~3mg/㎠부착한다. 이와 같은 로광, 형광체 불어붙임, 부착의 조작을 계속하여 청, 적 형광체 관하여 행하면 패이스패널의 내면에 3색형광체의 도트 또는 스트라이프가 형성된다.At this time, the temperature and purity of about 25 ± 5 ° C. and 55 ± 6% are appropriate. Here, when the rust phosphor powder is blown and air sprayed, the phosphor adheres to 2.5 to 3 mg / cm 2 only at the point where the adhesion is caused to the film. If the above operation of furnace light, phosphor blowing, and adhesion is continued with respect to blue and red phosphors, dots or stripes of tricolor phosphors are formed on the inner surface of the face panel.
이 방법으로 형성된 형광체 도트 또는 스트라이프는 조성중의 중크롬산 암모늄과 알긴산프로피렌 글리콜이 로광에 의해 가교 결합하여 물에 불용으로 되어 있기 때문에 종래와 같은 암모니아가스에 의한 정착 조작을 특별하게 실시할 필요는 없다.The phosphor dot or stripe formed by this method does not need to perform a conventional fixing operation with ammonia gas, because ammonium dichromate and propylene glycol alginate in the composition are crosslinked by luminescence and insoluble in water.
이와 같이하여 형성된 형광면의 전면(全面)을 0.2~0.3%(중량% 이하같음)의 폴리비닐 알콜 수용액으로 도포한후 3~3.5% 이소부틸메타클리레이드 수지의 토루엔The entire surface of the fluorescent surface thus formed is coated with a 0.2% to 0.3% polyvinyl alcohol aqueous solution and then toluene of 3 to 3.5% isobutyl methacrylate resin.
조성 1Composition 1
알긴산프로피렌글리콜에스텔 0.6%Alginate propylene glycol ester 0.6%
P-N.N디메틸아미노벤젠디아조늄염화아연 3.0%P-N.Ndimethylaminobenzenediazonium zinc chloride 3.0%
플루토닉 L-92(WYENBOTTE화학제) {옥시에틸렌옥시프로피렌블록코포리머} 0.003%Plutonic L-92 (manufactured by WYENBOTTE Chemical) {oxyethylene oxypropylene block copolymer} 0.003%
중크롬산암모늄 0.02%Ammonium Dichromate 0.02%
물 잔부Water balance
조성 2Composition 2
폴리비닐알콜 0.2%Polyvinyl Alcohol 0.2%
알긴산프로피렌글리콜에스텔 0.6%Alginate propylene glycol ester 0.6%
P-N.N. 미메틸아미노벤젠디아조늄염화아연 3.5%P-N.N. Methylaminobenzenediazonium zinc chloride 3.5%
플루토닉 L-92 0.003%Plutonic L-92 0.003%
염화벤젠디아조늄술폰산소오다 0.03%Chloride benzenediazonium sulfonate 0.03%
물 잔부Water balance
조성 3Composition 3
알긴산프로피렌글리콜에스텔 0.6%Alginate propylene glycol ester 0.6%
P-N.N. 디메틸아미노벤젠디아조늄염화아연 3.0%P-N.N. Dimethylaminobenzenediazonium zinc chloride 3.0%
플루토닉 L-92 0.003%Plutonic L-92 0.003%
디아조수지 A(동경응화제) 0.1%Diazo Resin A (Tokyo Condensing Agent) 0.1%
물 잔부Water balance
이상의 어느 조성의 액으로 감광성 막을 만든 경우도 종래와 같은 정착조작을 행하여도 로광개소는 물에 불용화하여 그대로 필밍공정으로 이행가능하게 되어 종래에 비하여 정착공정을 생략 단축할 수 있었다.In the case where the photosensitive film is made of the liquid of any of the above compositions, even if the fixing operation is performed in the same manner as before, the furnace light portion is insoluble in water and can be transferred to the peeling process as it is, and thus the fixing process can be omitted.
또 이미 기술한 바와 같이 감광성의 수지와 결착제와의 로광시의 광에 의한 가교반응의 진행으로 형광체는 패널의 글라스면에 견고하게 부착하여 있으며, 물, 알콜, 아세톤 등의 용매, 초산, 주석선, 숙신산, 구연산, 옥살산 등의 유기산, 탄산, 염산 등의 무기산, 암모니아수용액, 가성소다 등의 알칼리수용액에 견뎌낼 수 있으므로 이러한 용액 또는 용매로 3색형광체를 부착시킨후 세정하는 것에 의해 불필요한 반응 생성물 및 타색에 혼합하여 있는 형광체를 제거할 수 있어 색순도가 향상하여 배이킹 잔사가 감소하여 형광면의 휘도가 향상된다.In addition, as described above, the phosphor is firmly adhered to the glass surface of the panel due to the progress of the crosslinking reaction by the light when the photosensitive resin and the binder are exposed to light, and solvents such as water, alcohol, acetone, acetic acid and tin It can endure organic acids such as succinic acid, citric acid and oxalic acid, inorganic acids such as carbonic acid and hydrochloric acid, aqueous alkali solution such as aqueous ammonia solution and caustic soda. It is possible to remove the phosphor mixed in the product and other colors to improve the color purity, the backing residue is reduced, the brightness of the fluorescent surface is improved.
이상 설명한 바와 같이 본 발명에 의하여 형광체의 경제적사용, 일반적으로 짧은 간단한 공정이라는 종래의 드라이프로세스의 이점이 유지된채 정착조작이 불필요하게 되어 공정이 가일층 간단하게되고 한편으로는 부착력이 향상하여 세정을 양호하게 행할 수 있으므로 색순도 향상 휘도 향상에 도움이 되는 등의 효과가 얻어진다.As described above, according to the present invention, the fixing operation is not required while maintaining the advantages of the conventional dry process, which is economical use of phosphors and generally a short simple process, and the process is further simplified. Since it can perform favorably, the effect of being helpful for color purity improvement brightness improvement, etc. is acquired.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019790002827A KR830000414B1 (en) | 1979-08-20 | 1979-08-20 | Color water pipe fluorescent surface formation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019790002827A KR830000414B1 (en) | 1979-08-20 | 1979-08-20 | Color water pipe fluorescent surface formation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR830000414B1 true KR830000414B1 (en) | 1983-03-07 |
Family
ID=19212631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019790002827A KR830000414B1 (en) | 1979-08-20 | 1979-08-20 | Color water pipe fluorescent surface formation method |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR830000414B1 (en) |
-
1979
- 1979-08-20 KR KR1019790002827A patent/KR830000414B1/en active
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