Search results
Results from the WOW.Com Content Network
With modern laser-engraving technology, personalized rubber stamps can be made in minutes. Rubber stamps for business commonly show an address, corporate logo and business registration number. [5] [6] Some stamps also have movable parts that allow the user to adjust the date or the wording of the stamp. They are used to date incoming mail, as ...
Barium, typically as barium nitrate imparts a yellow or "apple" green color to fireworks; [30] for brilliant green barium chloride is used. Barium peroxide is a catalyst in the aluminothermic reaction for welding rail tracks. It is also a green flare in tracer ammunition and a bleaching agent. [31] Barium titanate is a promising electroceramic ...
In many instances, the refusal of a constitutional monarch to rubber stamp laws passed by parliament can set off a constitutional crisis.For example, when then-king Baudouin of Belgium, because of his religious objections, refused to sign a bill legalizing abortions in April 1990, the Belgian Federal Parliament declared him temporarily unable to reign.
A composite, thin PDMS stamp with a rigid back support has been used for patterning to help solve this problem. Magnetic field assisted micro contact printing: to apply a homogeneous pressure during the printing step, a magnetic force is used. For that, the stamp is sensitive to a magnetic field by injecting iron powder into a second layer of PDMS.
Rubberized explosives are flat sheets of solid but flexible material, a mixture of a powdered explosive (commonly RDX or PETN) and a synthetic or natural rubber compound. Rubberized sheet explosives are commonly used for explosive welding and for various other industrial and military applications. Rubberized explosives can be cut to specific ...
Traditional wax seals continue to be used on certain high-status and ceremonial documents, but in the 20th century they were gradually superseded in many other contexts by inked or dry embossed seals and by rubber stamps. While many instruments formerly required seals for validity (e.g. deeds or covenants) it is now unusual in most countries in ...
A wide range of agents have been used to prevent this, with many of the early agents such as lead stearate, organotins and cadmium complexes being highly toxic. Safer modern alternatives include metallic soaps such as calcium stearate, as well as barium and zinc compounds, along with various synergists. [31] Addition levels vary typically from ...
The following types of material are excluded (although they may also be collected by crystallography stamp enthusiasts): Postal stationery, [10] e.g. a postcard depicting a crystallographer with a non-crystallographic stamp affixed; Cinderella, local, private or personal issues, i.e. unofficial stamps; Non-postal stamps, e.g. revenue stamps [11]