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  3.   誠  文  堂
  4. I made a pi stamp.
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  • Nov 22, 2024
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Nov 22, 2024

I made a pi stamp.

  誠   文  堂   誠  文  堂
At one point, there was a lot of talk on "X" and online news about a certain stamp shop in Shimane Prefecture that carved the value of pi into their stamps. If I remember correctly, it was also featured on television... I apologize for bringing up a personal matter, but my wife, who is from Shimane Prefecture, was very pleased with this news. However, gradually, my artisan spirit began to ignite... I also tried my hand at carving. Could I carve something even better than the stamp shop in Shimane? φ15, φ18, φ21... which material should I carve on? What should I carve? After much deliberation, I decided to try to carve as much of pi as possible. I thought, "Let's try carving a rather long sentence like 'Seibundo's high-precision rubber relief printing has been built on over half a century of unique research and development since its founding in 1948...'" I did it. I would be happy if you could take a look when you have some free time. The PDF document of the pi stamp might be easier to read. By the way, our company can also carve letters as small as 0.5mm into molds, so we can create rubber stamps that are 0.5mm in size as well. Tomorrow is "Labor Thanksgiving Day," a holiday. Let's both do our best today. Thank you very much.
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円周率ハンコ.pdf[192719]

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This is the page for registered seals.
We can create various types of seals such as registered seals, bank seals, personal seals, corporate seals, and address seals, so please feel free to contact us.

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Corporate seal, company seal

Corporate seal, company seal

The company seal is an important stamp that represents the authority and symbol of a company or organization. It is used on contracts, receipts, and other general documents for corporations and organizations.

  • Marking machine

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Corporate seal, representative seal

Corporate seal, representative seal

The representative seal is an essential stamp for the registration of company establishment. It is a legally important corporate seal that proves social credibility and authority. It is a significant stamp registered with the Legal Affairs Bureau, accompanied by legal authority and obligations.

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Corporate seal discount seal

Corporate seal discount seal

The seal is stamped across two documents for important documents, stock certificates, etc., at the time of the contract. It serves as evidence for estimates, bids, contracts, and so on.

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Address stamp / check stamp

Address seal and check seal

■General seals and rubber stamps will be provided according to your requests. ■For corporate clients such as companies and schools, we offer special pricing and significant cost reductions. ■We handle various manufacturers for date stamps, rotary stamps, subject stamps, computer subject stamps, etc. Please request a quote first.

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Seal or official seal

Seal (or official seal)

A registered seal is the most important type of seal and is associated with the establishment of legal and social rights and obligations. It is a seal that is registered at the municipal office and for which a seal certificate is obtained. Generally, it includes the person's name. It is used for contract documents, real estate registration and sales such as land and buildings, and vehicle registration, among other purposes.

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Bank seal, personal seal, correction seal

Bank seal, personal seal, correction seal

"Bank seal" The bank seal, also known as the treasure seal, is an important stamp used for financial transactions, such as time deposits, transfer deposits, and postal savings. "Personal seal" The personal seal is commonly used for general office work (such as invoices, attendance records, and simple monetary receipts) and is a stamp that is always carried for the purpose of stamping.

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General rubber stamp (Techno Touch data stamp)

General rubber stamp (Techno Touch data stamp)

■We will respond to your requests for general seals and rubber stamps. ■For corporate clients such as companies and schools, we offer special pricing and further significant cost reductions. ■We handle various manufacturers for date stamps, rotary stamps, subject stamps, computer subject stamps, etc. Please request a quote first.

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Modular connected rubber stamp (minimum character size 0.5mm)

Modular connection rubber stamp (minimum character size 0.5mm!!)

Reconfigurable linked rubber stamp (it has a handle). Because the tip is narrow, it can be used to stamp areas that are typically inaccessible to regular rubber stamps, such as gaps in products.

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Hand-operated stamp "Direct Simple Hand Stamp" demo machine available for free rental.

Direct Simple Hand Stamp

This is a manual type simple hand stamp. You can freely choose the font, size of the characters, pitch, and more. The ink pad is built into the main body, making it ideal for continuous stamping.

  • Office supplies and stationery

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Seal Negative Film Printing System

This is a negative film printing system that uses commercially available inkjet printers (specified models) as a replacement for the existing plate-making system.

With the recent spread of digital cameras, film and opaque materials for the seal industry are disappearing. In fact, matte film has vanished from this industry. Those who have been using the previous system have made tremendous efforts to adapt, but this system does not require any darkroom, camera, film, developing solution, fixing solution, opaque materials, etc., unlike traditional systems. There is also no need for the technique of developing film. Additionally, film, developing solution, and fixing solution must be treated as industrial waste when disposed of, but this system produces no industrial waste at all, and everything can be disposed of as combustible waste without any issues.

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Related catalog(13)

Corporate seal, representative seal

Corporate seal, representative seal

PRODUCT
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Corporate seal - corner seal

Corporate seal - corner seal

PRODUCT
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Address stamp / check stamp

Address stamp / check stamp

PRODUCT
  • E-book viewing
  • Catalog download

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General rubber stamps and data stamps

General rubber stamps and data stamps

PRODUCT
  • E-book viewing
  • Catalog download

Contact this catalog

Corporate seal discount seal

Corporate seal discount seal

PRODUCT
  • E-book viewing
  • Catalog download

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Bank seal, personal seal, correction seal

Bank seal, personal seal, correction seal

PRODUCT
  • E-book viewing
  • Catalog download

Contact this catalog

Registered seal

Registered seal

PRODUCT
  • E-book viewing
  • Catalog download

Contact this catalog

Office Supplies Handheld Stamp "Direct Simple Hand Stamp"

Office Supplies Handheld Stamp "Direct Simple Hand Stamp"

CATALOG
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Eternal Ink (STAMP INK) - Catalog

Eternal Ink (STAMP INK) - Catalog

PRODUCT
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Modular stamp with interchangeable components

Modular stamp with interchangeable components

PRODUCT
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Simple Hand Stamp - One-Touch Hand Stamp

Simple Hand Stamp - One-Touch Hand Stamp

PRODUCT
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Seal Negative Film Printing System

Seal Negative Film Printing System

PRODUCT
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Office Supplies Seibundo Co., Ltd. Comprehensive Catalog of Marking Stamps

Office Supplies Seibundo Co., Ltd. Comprehensive Catalog of Marking Stamps

CATALOG
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Notice of Online Seminar (Simple Western)

  • NEW
  • OTHER

<Title> Development of Gene Expression Control Technology through RNA Hacking In the latest presentation paper, we have utilized Abby. Associate Professor Yosuke Katsuta from Kumamoto University Graduate School of Advanced Science and Technology, Analytical Chemistry Laboratory (also co-founder of StapleBio), will be giving a presentation in an online seminar. He is working on the development of RNA hacking technology aimed at controlling gene expression by utilizing short nucleic acids named Staple to change the higher-order structure of target mRNA. He will present the latest data focusing on the results of cell experiments and animal experiments in the development of this technology. Related paper on the presentation content: Staple oligomers induce a stable RNA G-quadruplex structure for protein translation inhibition in therapeutics | Nature Biomedical Engineering

Oct 24, 2025

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Add functionality to voice warp transfer.

  • NEW
  • OTHER

"Rimo Phone" adds functionality when using voice warp transfer. By using Rimo Phone at the destination of the voice warp transfer, you can enhance the capabilities of voice warp. ★ Multiple voice warp transfers ★ Play a message after voice warp transfer ★ Change the voicemail message after voice warp transfer ★ Check voicemail via browser ★ Notify via email for unsupported features For more details, please see the link below.

Oct 24, 2025

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Rainin Gift Campaign until December 26, 2025

  • NEW
  • EVENT

Please answer the survey and apply for original goods. Among those who apply, we will randomly select 20 people each month to receive a set of original goods (pipettes are not included). For more details, please check the link below.

Oct 24, 2025

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【September 1, 2025 - April 30, 2026】KF Titration Device and Analytical Balance Set Campaign

  • NEW
  • EVENT

During the campaign period, we will sell the analytical balance MR304 at half the regular price to customers who request a quote or inquiry for the EVA Karl Fischer titration device (models V1, V3, C1, or C3) from this campaign page. For details on the eligible products, please refer to the product page or download the campaign flyer. Don't miss this great opportunity to significantly enhance your accuracy and efficiency. You can find more details at the link below.

Oct 24, 2025

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We have launched a page regarding our contract manufacturing business.

  • NEW
  • COMPANY

Our company has started a contract manufacturing business. We are equipped with advanced facilities, including equipment for manufacturing Class 5 hazardous materials under the Fire Service Act, low-temperature reaction vessels capable of handling -25°C, and centrifuges with Ti lining. With the technological expertise cultivated as a global company in hydrazine, we provide consistent support from research and development to mass production.

Oct 24, 2025

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  • 12/14までに無料掲載を申し込むだけ 抽選で20名様にAmazonギフトカード5,000円分プレゼント!
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