JPH0514530B2 - - Google Patents
Info
- Publication number
- JPH0514530B2 JPH0514530B2 JP59115583A JP11558384A JPH0514530B2 JP H0514530 B2 JPH0514530 B2 JP H0514530B2 JP 59115583 A JP59115583 A JP 59115583A JP 11558384 A JP11558384 A JP 11558384A JP H0514530 B2 JPH0514530 B2 JP H0514530B2
- Authority
- JP
- Japan
- Prior art keywords
- pearl
- calcium carbonate
- oyster
- nucleus
- mother
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 45
- 239000011049 pearl Substances 0.000 claims description 28
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 20
- 235000014653 Carica parviflora Nutrition 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 12
- 239000001023 inorganic pigment Substances 0.000 claims description 11
- 238000000465 moulding Methods 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- 238000012258 culturing Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 244000132059 Carica parviflora Species 0.000 claims 1
- 241000237502 Ostreidae Species 0.000 description 21
- 235000020636 oyster Nutrition 0.000 description 20
- 241000243321 Cnidaria Species 0.000 description 11
- 239000010984 cultured pearl Substances 0.000 description 8
- 241000237852 Mollusca Species 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 241000490567 Pinctada Species 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 241000242757 Anthozoa Species 0.000 description 2
- 241000548230 Crassostrea angulata Species 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000001513 hot isostatic pressing Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910021532 Calcite Inorganic materials 0.000 description 1
- 229920002101 Chitin Polymers 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 241000237536 Mytilus edulis Species 0.000 description 1
- 241000627951 Osteobrama cotio Species 0.000 description 1
- 241000269821 Scombridae Species 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 1
- 239000001055 blue pigment Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 229910000152 cobalt phosphate Inorganic materials 0.000 description 1
- 108010006161 conchiolin Proteins 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000012364 cultivation method Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000001056 green pigment Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 235000020640 mackerel Nutrition 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000001617 migratory effect Effects 0.000 description 1
- 235000020638 mussel Nutrition 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 235000013799 ultramarine blue Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000001052 yellow pigment Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
Description
本発明は真珠の養殖方法に関するものであつ
て、さらに炭酸カルシウムを主成分とする所望の
色彩を持つた成型体を、真珠の核として用いる真
珠の養殖法に係わる。
養殖真珠は、アコヤ貝などの母貝に核を挿入し
てその母貝を一定期間飼養し、核の表面に真珠層
を形成させることで製造されるが、この真珠養殖
に於いて、良質の真珠を歩留りよく取得するため
には、母貝に挿入する核の選択が極めて大切であ
る。一般に真珠養殖に使用する核は、母貝を死滅
させてしまうような毒性があつてはならないこと
を始めとして、母貝に拒絶されないこと、遊走細
胞への着床がよいこと、比重が炭酸カルシウムの
それにほぼ等しいこと、色むらがないこと、表面
が平滑であることなどの諸要件を備えていなけれ
ばならないとされている。こうした事情から、養
殖真珠の核には、ドブ貝などの殻を小球状に研磨
したものが広く使用されている。しかし、ドブ貝
から製造される真珠核は、大型のドブ貝の入手が
困難であるため一般に小粒であつて、10mmφ以上
の大粒のものはかなり高価であるばかりでなく、
ほとんど入手できないのが現状である。また、上
記の如き貝殻製の核は白色であるため、これを使
用して得られる養殖真珠は、銀白色を呈するのが
通例である。
本発明は貝殻製の核に代えて、10mmφ以上の大
粒の核も含めた任意の粒径の核が得られるととも
に所望の色彩に着色された成型体を核として使用
する真珠の養殖法を提供する。
即ち、本発明の方法は母貝に核を挿入してその
母貝を一定期間飼養することで核の表面に真珠層
を形成させる真珠の養殖法に於いて、粒径が0.1
〜105μｍの範囲にある、サンゴ粉末20〜100μｍ
と、粒径が１〜100μｍの範囲にある炭酸カルシ
ウム０〜80wt％と、０〜20wt％の無機顔料を混
合し、この混合物を温度400〜1500℃の温度で加
圧成型して得た成型体を、養殖真珠の核として養
いることを特徴とする。
本発明に於いて、サンゴ粉には、装身具又は室
内装飾品として利用できない所謂屑サンゴが使用
できる。屑サンゴは、炭酸カルシウムを主成分と
し、しかもその炭酸カルシウムは結晶度の低いア
ラゴナイト（斜方晶系）とカルサイト（六方晶
系）であるため、化学的に合成される軽質炭酸カ
ルシウム（沈降炭酸カルシウム）や石灰石起源の
重質炭酸カルシウムに比較して焼結しやすい特徴
があるばかりでなく、少量ではあるが焼結時にバ
インダーとしての作用を期待できる有機物（キチ
ン、コンキオリンなど）を含有する。しかも肩サ
ンゴは、扁平状、紡錘状などの異方性形状をとる
が、このことは焼結成型体を取得する上で好都合
である。一般にサンゴは550℃以上に加熱される
と二酸化炭素と酸化カルシウムへの分解が始まる
が、加圧された状態で加熱される場合は、550℃
以上の温度に加熱される場合でも圧力との関係
で、二酸化炭素と酸化カルシウムに分解すること
なく炭酸カルシウムの状態を維持し、焼結して結
合剤として作用する。従つて、本発明において
は、サンゴ粉末それ自体、及びそれと別に配合す
る炭酸カルシウムとが一体となつて焼結し、成型
体となるものである。なお、本明細書に於ける粒
径は、特別な断りがない限り、平均粒径を意味す
る。本発明では屑サンゴを粉砕し、粒径が0.1〜
105μｍの範囲にある粉末を、真珠核の原料とし
て使用するのであつて、この使用量は真珠核の20
〜100wt％の範囲にある。
既述した通り、サンゴ粉に元来含まれている有
機物は、バインダーとして機能するものと考えら
れるので、これら粉末は焼成とか薬品処理とかを
受けていないことが好ましい。しかし、有機物を
大量に含む場合は、加圧成型時の応力分布線に有
機物が偏析し、放冷後の成型体にキレツが発生す
る恐れがあるため、そうした事態が予想される場
合には、予め粉末に温和な熱処理を施しておくこ
とを可とする。有機物の偏析に起因するキレツ発
生は、後述の如く真珠核の原料に炭酸カルシウム
を配合することでも、ある程度防止することがで
きる。
本発明の真珠核には、炭酸カルシウムを０〜
80wt％の範囲で配合することができ、この場合
の炭酸カルシウムとしては、その粒径が１〜
100μｍの範囲にある限り、軽質炭酸カルシウム
及び重質炭酸カルシウムのいずれもが使用可能で
ある。
さらに、本発明においては、サンゴ粉等と炭酸
カルシウムに無機顔料を加えて加圧下に加熱成型
すれば、所望の色彩に着色した真珠核を得ること
ができ、これを用いれは所望の色合いをもつた着
色真珠が得られる。
しかし、無機顔料を使用しなくても加圧成型さ
れた真珠核が所望の色を呈する場合、例えば真珠
核の原料として着色したサンゴ粉を使用する場合
には、当然のことながら無機顔料の配合を必要と
しない。本発明では無機顔料の使用量は真珠核の
０〜20wt％の範囲で選択される。
本発明で使用可能な無機顔料の代表的なものと
しては、酸化チタン、硫酸バリウム、酸化亜鉛
（以上白色）、ベンガラ、カドミウムレツド（以上
赤色）、オーレリオン、バナジウムイエロー（以
上黄色）、コバルトグリーン（緑色）、コバルトブ
ルー、バナジウムブルー、ウルトラマリーンブル
ー（以上青色）、コバルトバイオレツト（紫色）
などを挙げることができる。
本発明の方法で使用される真珠核は、サンゴ粉
末20〜100wt％と、炭酸カルシウム０〜80wt％
と、無機顔料０〜20wt％とを混合し、この混合
物を400〜1500℃の温度で加熱し、典型的には球
形に加圧成型することによつて得ることができる
が、成型体の表面が平滑でないと、稜柱層が形成
されやすく、逆に真珠層の形成に長時間を要する
不都合がある。従つて、成型時の圧力は100／Kg
cm2以上の圧力とし、成型時間を５〜90分間程度と
することが好ましい。このような加圧成型はホツ
トプレスでも実施できるが、熱間静水圧成型によ
るのが最も好ましい。成型体の寸法は、その成型
体が真珠核として挿入される母貝の寸法に応じて
任意の寸法のものが成型可能である。アコヤ貝で
は大きくて８mmφ、通常は６mmφ以下のものが、
核として使用され、クロチヨウ貝、シロチヨウ貝
及び淡水産のイケチヨウ貝では10〜17mmφのもの
が核として使用される。
上記の如く調整された加圧成型体を養殖真珠の
核として使用するにあたつては、ドブ貝などの貝
殻を研磨して得られる真珠核と全く同様に扱うこ
とができ、母貝の種類も選ばない。従つて、カワ
シンジユ貝、イケチヨウ貝、カラス貝（以上淡水
産）、アコヤ貝、クロチヨウ貝、シロチヨウ貝、
マベ、イガイ（以上海水産）などの母貝に、本発
明の加圧成型体は真珠核として使用することがで
きる。
母貝中に挿入された核の周囲には、まず稜柱層
が形成され、次いでその表面に真珠層が形成され
るが、真珠層の厚さは養殖期間にほぼ依存し、通
常１年で0.5mm程度成長する。真珠光沢も真珠層
の厚さによつて変化し、一般に真珠層が厚いほど
光沢も増大する。有色真珠核を用いる場合、真珠
層が余りに厚くなると、核自体の色が隠蔽されて
しまう恐れがあるので、真珠層の厚さを0.05〜
1.0mm程度とするのが適当である。
以上述べて来たところから明らかな通り、本発
明の場合は、母貝に挿入される加圧成型体は、主
成分が炭酸カルシウムであつて、母貝に対する有
害成分を含まず、しかも表面が滑らかであるの
で、母貝によくなじみ、母貝の負担となることが
ない。これに加えて、本発明の加圧成型体は所望
の色彩に着色することができるので、銀白色を呈
する普通の真珠とは異なる色合いの養殖真珠を得
ることができる。そして本発明の方法で得られる
養殖真珠は、過酸化水素水などでシミ抜きしても
脱色することがなく、穴あけ加工の際に割れを生
ずることもない。
実施例
１群100個の１年生アコヤ貝それぞれに、下記
の如き組成の真珠核（６mmφ）を１個入れ、５月
〜12月にかけて南宇和海で養殖した。真珠核の種
類と養殖成績を次表に示す。なお、真珠核の調整
に使用した無機顔料は、次の通りである。サンゴ
粉、重質炭酸カルシウム及び無機顔料の所定量を
混入し、この混合物を熱間静水圧法で球状に成型
した。成型条件は、600℃、1000Kg／cm2である。
成型後、研磨し６mmφの真珠核を得た。
緑色顔料 クリスタルグリーンGA−１（資生堂
製）
主成分：CoTiO3
黄色顔料 ダイヤピグメント6000（三菱金属）
主成分：CdS
青色顔料 9300（日陶産業）
主成分：CoO・Al2O3
The present invention relates to a method for cultivating pearls, and more particularly, to a method for culturing pearls in which a molded body having a desired color and containing calcium carbonate as a main component is used as a pearl core. Cultured pearls are produced by inserting a nucleus into a mother oyster such as an Akoya oyster and raising the mother oyster for a certain period of time to form a nacre layer on the surface of the nucleus. In order to obtain pearls with a high yield, it is extremely important to select the nucleus to be inserted into the mother oyster. In general, the nuclei used for pearl farming must not be toxic enough to kill the mother oyster, must not be rejected by the mother oyster, have good implantation in migratory cells, and have a specific gravity of calcium carbonate. It is said that it must meet various requirements such as being approximately equal to that of , having no uneven color, and having a smooth surface. For these reasons, cultured pearls are made from shells polished into small spheres, such as shells of brown oysters. However, pearl nuclei produced from Dobu oysters are generally small because it is difficult to obtain large Dobu oysters, and large kernels of 10 mm or more are not only quite expensive, but also
Currently, it is almost impossible to obtain. In addition, since the shell-made core as described above is white, cultured pearls obtained using it usually have a silvery white color. The present invention provides a method for cultivating pearls that uses molded bodies colored in a desired color as the core, in place of shell-made cores, in which a core of any particle size, including large cores of 10 mm or more, can be obtained. do. That is, the method of the present invention is a pearl cultivation method in which a nacre layer is formed on the surface of the nucleus by inserting a nucleus into a mother oyster and cultivating the mother oyster for a certain period of time.
Coral powder 20-100μm in the range ~105μm
, 0 to 80 wt% of calcium carbonate with a particle size in the range of 1 to 100 μm, and 0 to 20 wt% of an inorganic pigment, and this mixture was pressure molded at a temperature of 400 to 1500°C. It is characterized by cultivating its body as the nucleus of cultured pearls. In the present invention, so-called scrap coral that cannot be used as jewelry or interior decoration can be used as the coral powder. The main component of debris coral is calcium carbonate, and since the calcium carbonate is aragonite (orthorhombic system) and calcite (hexagonal system) with low crystallinity, chemically synthesized light calcium carbonate (precipitated Not only does it have the characteristic of being easier to sinter than calcium carbonate) or heavy calcium carbonate derived from limestone, but it also contains a small amount of organic matter (chitin, conchiolin, etc.) that can be expected to act as a binder during sintering. . Furthermore, shoulder corals have anisotropic shapes such as flat and spindle shapes, which is convenient for obtaining sintered bodies. In general, corals begin to decompose into carbon dioxide and calcium oxide when heated above 550℃, but when heated under pressure
Even when heated to temperatures above, it maintains its calcium carbonate state without being decomposed into carbon dioxide and calcium oxide, which acts as a binder by sintering, depending on the pressure. Therefore, in the present invention, the coral powder itself and the calcium carbonate added separately are sintered together to form a molded body. Note that the particle size in this specification means an average particle size unless otherwise specified. In the present invention, waste coral is crushed and the particle size is 0.1~
Powder in the range of 105 μm is used as the raw material for pearl nuclei, and the amount used is 20 μm for pearl nuclei.
~100wt% range. As mentioned above, the organic substances originally contained in coral powder are considered to function as binders, so it is preferable that these powders have not been subjected to firing or chemical treatment. However, if a large amount of organic matter is contained, there is a risk that the organic matter will segregate in the stress distribution line during pressure molding and cause cracks in the molded product after cooling. It is possible to subject the powder to a mild heat treatment in advance. The occurrence of cracks due to the segregation of organic substances can be prevented to some extent by adding calcium carbonate to the pearl core raw material as described below. The pearl core of the present invention contains 0 to 0 calcium carbonate.
It can be blended in a range of 80wt%, and in this case, the calcium carbonate has a particle size of 1 to 1.
Both light calcium carbonate and heavy calcium carbonate can be used as long as the thickness is within the range of 100 μm. Furthermore, in the present invention, by adding an inorganic pigment to coral powder etc. and calcium carbonate and heat molding under pressure, it is possible to obtain a pearl nucleus colored in a desired color. Colored pearls are obtained. However, if the pressure-molded pearl core exhibits the desired color even without the use of inorganic pigments, for example, if colored coral powder is used as the raw material for the pearl core, it is natural to incorporate inorganic pigments. does not require. In the present invention, the amount of inorganic pigment used is selected within the range of 0 to 20 wt% of the pearl core. Typical inorganic pigments that can be used in the present invention include titanium oxide, barium sulfate, zinc oxide (more white), red iron oxide, cadmium red (more red), aurelion, vanadium yellow (more yellow), and cobalt green. (green), cobalt blue, vanadium blue, ultramarine blue (more blue), cobalt violet (purple)
etc. can be mentioned. The pearl core used in the method of the present invention contains 20 to 100 wt% of coral powder and 0 to 80 wt% of calcium carbonate.
It can be obtained by mixing 0 to 20 wt% of an inorganic pigment, heating this mixture at a temperature of 400 to 1500°C, and typically pressure molding it into a spherical shape, but the surface of the molded product If it is not smooth, a ridge-column layer is likely to be formed, and conversely, it takes a long time to form a nacre layer, which is disadvantageous. Therefore, the pressure during molding is 100/Kg
It is preferable to use a pressure of at least cm 2 and a molding time of about 5 to 90 minutes. Although such pressure molding can be performed by hot pressing, it is most preferable to use hot isostatic pressing. The molded body can have any size depending on the size of the mother oyster into which the molded body is inserted as a pearl nucleus. Akoya oysters are as large as 8mmφ, but are usually smaller than 6mmφ.
It is used as a nucleus, and those with a diameter of 10 to 17 mm are used as the nucleus in black oysters, white oysters, and freshwater oyster oysters. When using the pressure-molded body prepared as described above as a cultured pearl core, it can be treated in exactly the same way as a pearl core obtained by polishing a seashell such as a brown oyster. I don't choose either. Therefore, the Japanese oyster shell, the Japanese oyster shell, the crow oyster (all freshwater products), the pearl oyster, the black oyster shell, the white oyster shell,
The pressure-molded body of the present invention can be used as a pearl core for mother molluscs such as mackerel and mussel (all marine products). A ridge layer is first formed around the nucleus inserted into the mother oyster, and then a nacre layer is formed on its surface, but the thickness of the nacre layer roughly depends on the cultivation period and is usually 0.5 in a year. It grows about mm. Nacreousness also varies depending on the thickness of the nacre, and generally the thicker the nacre, the greater the luster. When using colored nacre, if the nacre becomes too thick, the color of the nacre itself may be hidden, so the thickness of the nacre should be 0.05~.
Approximately 1.0 mm is appropriate. As is clear from what has been described above, in the case of the present invention, the pressure-molded body inserted into the mother mollusk has calcium carbonate as its main component, does not contain any harmful components to the mother mollusk, and has a smooth surface. Because it is smooth, it blends well with the mother mollusk and does not put a burden on the mother mollusk. In addition, since the pressure-molded product of the present invention can be colored in a desired color, it is possible to obtain cultured pearls with a color different from that of ordinary silvery-white pearls. Cultured pearls obtained by the method of the present invention do not discolor even when stains are removed with hydrogen peroxide, and do not crack during drilling. Example One pearl nucleus (6 mmφ) having the composition shown below was placed in each group of 100 one-year-old Akoya oysters and cultured in the Minami Uwa Sea from May to December. The following table shows the types of pearl nuclei and their culture results. The inorganic pigments used to prepare the pearl core are as follows. Predetermined amounts of coral powder, heavy calcium carbonate, and inorganic pigment were mixed, and the mixture was molded into a sphere by hot isostatic pressing. The molding conditions were 600°C and 1000Kg/cm 2 .
After molding, it was polished to obtain a pearl core with a diameter of 6 mm. Green pigment Crystal Green GA-1 (manufactured by Shiseido) Main component: CoTiO 3 Yellow pigment Diamond Pigment 6000 (Mitsubishi Metals) Main component: CdS Blue pigment 9300 (Nissto Sangyo) Main component: CoO・Al 2 O 3
【表】【table】
【表】
上表から明らかな通り、本発明の方法によつて
養殖した第１群〜第５群のアコヤ貝からは、ドブ
貝の核を用いたアコヤ貝群（No.12群）にほぼ匹敵
する歩留りで養殖真珠を得ることができ、しかも
その真珠には核に配合する無機顔料を選択するこ
とにより所望の色を付与することができる。[Table] As is clear from the above table, the pearl oysters of Groups 1 to 5 cultured using the method of the present invention are almost identical to the pearl oyster group (group No. 12) that uses the core of brown oysters. Cultured pearls can be obtained with comparable yields, and the desired color can be imparted to the pearls by selecting the inorganic pigments to be added to the core.
Claims (1)
20〜100wt％及び粒径が１〜100μｍの範囲にある
炭酸カルシウム０〜80wt％と、０〜20wt％の無
機顔料を混合し、これを温度400〜1500℃で加圧
成型して得た成型体を核に用いることを特徴とす
る真珠の養殖法。1 Coral powder with a particle size in the range of 0.1 to 105 μm
A molded product obtained by mixing 0 to 80 wt% of calcium carbonate with a particle size of 20 to 100 wt% and a particle size of 1 to 100 μm, and 0 to 20 wt% of an inorganic pigment, and press-molding the mixture at a temperature of 400 to 1500°C. A method of culturing pearls that uses the body as the nucleus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59115583A JPS60259135A (en) | 1984-06-07 | 1984-06-07 | Breeding of color pearl |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59115583A JPS60259135A (en) | 1984-06-07 | 1984-06-07 | Breeding of color pearl |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60259135A JPS60259135A (en) | 1985-12-21 |
| JPH0514530B2 true JPH0514530B2 (en) | 1993-02-25 |
Family
ID=14666178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59115583A Granted JPS60259135A (en) | 1984-06-07 | 1984-06-07 | Breeding of color pearl |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60259135A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3254068B2 (en) * | 1994-01-05 | 2002-02-04 | 昌 松井 | Crystallized glass for pearl nucleus material and its manufacturing method |
| JP2006296274A (en) * | 2005-04-20 | 2006-11-02 | Keisuke Kasahara | Core of cultured pearl, method for producing the same and method for culturing pearl by using the same |
| JP2008237187A (en) * | 2007-03-29 | 2008-10-09 | Meiko Pearl Ushiku Kanko Kk | Nucleus for pearl, method for producing the same, and pearl |
-
1984
- 1984-06-07 JP JP59115583A patent/JPS60259135A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60259135A (en) | 1985-12-21 |
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