A process for manufacturing a coated metal strip having a metallic corrosion protection coating is provided. The process includes passing a metal strip through a molten metal bath comprising from 2 to 8 wt % aluminum, 0 to 5 wt % magnesium, up to 0.3 wt % additional elements, and a balance including zinc and inevitable impurities, to yield a molten metal coated metal strip, wiping the molten metal coated metal strip with a nozzle spraying a gas on either side of the molten metal coated metal strip and cooling the coating in a controlled manner until the coating has completely solidified, to obtain the coated metal strip. A temperature of the molten metal bath is from 350 to 700° C., and the cooling is conducted at a rate less than 15° C./s between a temperature on leaving a unit where the wiping occurs and a start of solidification of the coating, and then at a rate greater than or equal to 15° C./s between a start and an end of solidification of the coating.

A folding metal back plate includes a first plate portion, a second plate portion, and a folding plate portion connected to the first plate portion and the second plate portion. The folding plate portion has two first folding areas respectively disposed close to the first plate portion and the second plate portion, and a second folding area formed between the two first folding areas. The first folding area has multiple rows of spaced first openings. The second folding area has multiple rows of spaced second openings. Each first folding area constitutes a first unfolding length. The second folding area constitutes a second unfolding length. The first unfolding length of the first folding area is 0.2 to 0.5 times the second unfolding length of the second folding area.

A flanged duct blank has a male part defined by lead notches formed at each side of a leading end and has a female part defined by trail notches formed at each side of a trailing end. The male part includes a lock tab. The female part includes a leg part and a Z-bend. The Z-bend includes a leg part and a gap. The duct blank is repeatedly clamped and bent by a pivoting wiper to form a duct portion. The pivoting wiper includes a clench tool that has a retractable rib and a retractable roller. With the lock tab inserted into the Z-bend and the retractable rib engaged with the Z-bend, the retractable roller clenches the leg part over the lock tab to lock the male and female parts together in a duct seam.

What is described is a milling blank having a continuous shade gradient for production of an indirect dental restoration, composed of resin or a resin-based composite. What is also described is a method of producing such a milling blank by mixing two differently coloured pastes with continuous variation of the mixing ratio of the two pastes during the dispensing operation.

A steel part includes a steel sheet substrate and a coating on at least one surface of the steel sheet substrate. The coating includes between 0.2 and 0.7% by weight of Al, with a remainder of the metal coating being Zn and inevitable impurities. The steel sheet substrate and the coating have at least one deformation. An outer surface of the coating has a waviness Wa.sub.0.8 of less than or equal to 0.43 μm.

A dental blank for the manufacture of a dental restoration. The dental blank comprises a dental block and an insert with an opening facing toward an outer surface of the dental blank. The insert comprises at least one positioning element for the positioning of an abutment.

A coated metal sheet includes a steel substrate and a coating on at least one surface of the steel substrate. The coating includes between 0.2 and 0.7% by weight of Al, with a remainder of the metal coating being Zn and inevitable impurities. The coated metal sheet was subjected to a skin pass operation after coating. An outer surface of the metal coating has a waviness Wa.sub.0.8 of less than or equal to 0.55 μm.

A preform intended for the production of a dental prosthesis. The preform includes a group of agglomerated ceramic, glass-ceramic or glass particles, such that, as volume percents: more than 40% and less than 90% of the particles of said group have a size greater than 0.5 μm and less than 3.5 μm, said particles hereinafter being denoted “enamel particles”, and more than 10% and less than 60% of the particles of said group have a size greater than 3.5 μm and less than 5.5 μm, said particles hereinafter being denoted “dentine particles.” The microstructure of the preform is such that there is an axis X, termed “axis of variation”, along which the Ve/(Ve+Vd) ratio changes continuously, Ve and Vd denoting the volume percents of enamel particles and of dentine particles, respectively. The enamel and dentine particles representing, together, more than 90% of the volume of the agglomerated particles.

Provided is a dental blank. The dental blank includes: a seating portion provided in an artificial tooth processing apparatus; and a material portion configured to be inserted into the seating portion, wherein the material portion includes a plurality of outer contacting portions in contact with an inner side of the seating portion, and may have a polygonal shape in a cross-section.

Problem Precoating methods for previously adhering solder to areas to be soldered of a workpiece for an electronic part such as a printed circuit board, a chip part, or a wafer include the plating method, the hot leveling method, the solder paste method, the solder ball method, and the like. In these conventional precoating methods, solder did not uniformly adhere to areas to be soldered, solder did not completely adhere, and much equipment and time were required. The present invention provides a method which can perform precoating with uniform application and without the occurrence of defects using simple equipment and a workpiece to which solder is uniformly adhered. Means for Solving the Problem In the present invention, an excess amount of solder powder is dispersed atop an adhesive applied to a substrate, and then excess solder powder which is not adhered to the adhesive is removed. The surface on with solder powder is dispersed is then stacked on a workpiece to which flux is applied with the application of pressure, heating is then performed, and solder is adhered only to areas to be soldered.