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Vulcanized Rubber Stamps

The conventional red rubber stamp that everybody is familiar with will have been made in a vulcanizing press. The first rubber stamp vulcanizing press was patented in 1890 by Charles Schultze in New Orleans USA. Vulcanizing is today one of the most cost effective methods of making rubber stamps for standardized stamps. Each batch of stamps is produced utilizing a mould. This approach of manufacture is more suited to mark making where the same moulds are used over and over once again. Making custom made stamps with a vulcanizing press needing ‘as soon as only’ moulds will drive the expense of manufacture up significantly.Making the mould-before a mould can be made you need to have a master plate manufactured from metal or polymer, the master plate has the essential relief( the artwork is raised )to make an impression in the mould. Having a master plate made each time a mould is needed is what increases the cost of manufacture for vulcanized stamps. Pushing the master plate into a Matrix board creates the mould that will accept the rubber. Heat and pressure is applied to the master plate and matrix board inside a Vulcanizing press. The Matrix follows the shape of the relief supplied by the master plate, this then solidifies on cooling.Making Rubber Stamps-Creating stamps is a simple process once the

mould is made. Raw rubber stamp gum is placed on top of the mould and after that positioned inside the stamp press. Hydraulic pressure is placed upon the rubber and the mould from within the stamp press causing the rubber to melt into the locations of the mould which contain the images and text, treating and hardening takes about 10 minutes. Once treated the sheet of rubber is retreated from the mould and cut up into specific stamps to be attached to mounts.Cost of a vulcanizing system is approximately

$12,000 AUD Advantages -Low cost of production for mass produced stamps, excellent ink transfer.Disadvantages – Expense of producing master plates and moulds for custom made stamps.Laser Engraved Rubber Stamps The traditional raw rubber used for vulcanizing stamp passes away is quite inappropriate for the production of laser stamp passes away, the laser process needs an extremely even density and blemish complimentary surface area to produce an acceptable printed image from a stamp pass away. The rubber must also go through a specific curing procedure before it can be exposed to the elevated temperature of a laser beam.The depth of the engraving is identified by the laser speed, its wattage and the density of the rubber. A 50 or 100W engraver will engrave the rubber deeper and faster than a

25W machine, which may need a 2nd pass to achieve a comparable result. Normally supplied in an A4 size sheet form, a great quality laser rubber is required for inscribing stamp dies and need to also have ideal compression strength and ink transfer properties.To help the inscription process, it is required to remove the excess dust which is constantly created by the laser cutting action with an effective exhaust purification system. As very couple of, if any, CO2 laser engraving devices were at first function developed for etching and cutting rubber, setting up and preserving a reliable dust extraction system pays long term dividends. Mirrors, lenses and any exposed bearing surface areas need to be cleaned up thoroughly as part of a routine upkeep program. Any disregard in this location will be harmful to total problem totally free laser operation, as the develop up of dust and residue will impact running efficiency and the quality of the ended up stamp die. Lasers are controlled straight from a computer system, the software drivers supplied with lasers deal with numerous graphic programs such as CorelDraw.Approximate cost of a 25 watt Laser suitable for stamp making is$40,000 Benefits-Production is computer controlled, customized made stamps can be made quickly Downsides- High capital expense, maintenance costs and running will be much higher than vulcanizing or polymer techniques of manufacture.Liquid Polymer Rubber Stamps Transforming rubber

stamp polymer from a liquid into a strong to make stamps is quite interesting. Polymer stamps are produced in between 2 sheets of glass using accuracy controlled UV light which goes through an unfavorable including the stamp artwork strengthening the polymer. Unfavorable production has been streamlined with the introduction of water based

negative innovation, photographic chemicals for producing negatives are now a thing of the past.The first action in making polymer rubber stamps is to print your images, clipart or text onto Vellum, a nearly transparent paper like movie. To produce quality stamp artwork you should utilize a printer, inks from bubble jet printers are clear permitting UV light to pass where it must not. Water based negatives are easily rinsed after being exposed for a few minutes in a UV exposure stamp machine.Polymer contained in a sachet is now replacing the older

troublesome technique of using foam tape to develop a dam and pouring of rubber stamp polymers, the sachets have also resolved the age old problem of eliminating air bubbles from the poured polymer.The negative of your artwork and polymer sachet is sandwiched in between 2 sheets of glass spaced 2-3mm apart which is then exposed in the machine for a couple of minutes. Once you have finished the direct exposure it is an easy procedure of cutting open the sachet and getting rid of the excess unexposed polymer prior to returning the stamp die back to the device for a 10 minute curing. When the stamps are treated they can be cut up individually. Polymer sachets are readily available in a series of sizes up to A4 size.Processing time is about 30 minutes for a batch of polymer stamps.Cost of polymer stamp

making devices range from$3,500 AUD for an Australian made system created particularly for stamp making up to high-end imported units with computer system managed washout for $ 15,000 AUD.Advantages-Lower capital expense, polymers make practically clear stamps making them perfect for scrapbooking and card making. Stamp relief can be quickly controlled throughout exposure.Disadvantages-Early polymers did not accept inks in addition to polymers available today, this in addition to being new innovation triggered preliminary resistance to polymer stamps.Summary Most big stamp producers have a mix of the above devices. The unmounted rubber stamp dies produced with any of these manufacturing methods can be cut up and attached to basic hand stamps, dater stamps or self inking stamps. Craft stamps are usually attached to wooden blocks or when it comes to polymer stamps attached to clear acrylic blocks with adhesives or InstaGrip

mounting mat. Different makes produces stamp installs. Astron Industries in Australia manufacturer the clear hand stamp ‘Vuestamp’and also distribute the Ideal series of self inking installs.

Other brand names of self inking installs are Trodat, Colop and Shiny.

Vulcanizing is today one of the most cost effective methods of making rubber stamps for mass produced stamps. The traditional raw rubber used for vulcanizing stamp dies is quite inappropriate for the production of laser stamp passes away, the laser process needs an extremely even density and imperfection totally free surface area to produce an appropriate printed image from a stamp die. Disadvantages- High capital financial investment, upkeep costs and running will be much higher than vulcanizing or polymer approaches of manufacture.Liquid Polymer Rubber Stamps Transforming rubber

stamp polymer from a liquid into a solid to make stamps is quite fascinating. Polymer stamps are made between two sheets of glass using precision regulated UV light which passes through an unfavorable including the stamp artwork solidifying the polymer. The unmounted rubber stamp passes away produced with any of these manufacturing techniques can be cut up and attached to basic hand stamps, dater stamps or self inking stamps.

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