|Single Reduced||Double Reduced||Tin Coated Sheets|
|Gauge (inches)||0.0077 thru 0.0149||0.0060 thru 0.0118||0.0150 thru 0.0250|
|Width (inches)||20 thru 40||20 thru 40||20 thru 40|
Tin coating weight is expressed in pounds per base box and represents the total of tin coating on both sides with the exception of differentially coated tin plate.
Differentially Coated Tin Plate: A product having one surface more heavily tin coated than the opposite. The designation number is expressed by showing the two tin coating weights separated by a slash mark. The first number designation will represent the coating weight on the outside of coil or the top surface of cut sizes. In order to distinguish material having differential coatings, the side with the heavier coating is normally marked. By arrangement, a special marking can be supplied on the light coated side.
Coating Weight lb/bb
Tin Coating Weight
(per side) lb/bb
*The minimum spot value shall be not less than 80% of the minimum average coating weight.
Reflow is a 100% solid state induction heated process that provides an instantaneous change in surface of the tin plated steel from matte to mirror.
Bright Finish (melted): This is a high luster mirror like tin finish that results from an in-process melt and quench and is similar in appearance to the familiar hot dipped tin plate. Because of its strength, corrosion resistance, and mirror finish it finds wide acceptance for tin cans, crown caps, bottle tops, kitchen utensils, toys, electrical and electronic parts.
Matte Finish (unmelted): This is a grey-white and semi-lustrous finish that comes from the plating bath. It serves as an excellent base for paints, enamels, and lithograph applications. It can be soldered readily and formed on high speed equipment.
A chemical treatment is normally applied to the surface of tin plate. The purpose is to stabilize the surface to prohibit the growth of tin oxide on the surface, to prevent discoloration during soldering, and to prevent poor adhesion of lacquers used in tin can manufacturing.
Cathodic Sodium Dichromate (CDC) Treatment: This treatment is applied using a sodium dichromate solution with an applied current. This treatment provides a highly passivated surface against the formation of tin oxides. The aim range is 350 to 650 ug of chromium/ ft2 of surface area.
Sodium Dichromate Dip (SDCD) Treatment: This treatment comprises a simple dip through a sodium dichromate solution without any current. This treatment provides moderate passivation resistance to tin oxide. The aim range is 150 ug of chromium/ ft2 of surface area.
Electrolytic tin plate normally carries a very thin coating of oil to facilitate the separation of the wraps of a coil to prevent damage and to aid in customer processing. The oil is applied electrostatically in a range of 0.17 gms/ bb. The type of oil used is ATBC (acetyl tributyl citrate).
Eye Vertical: The coil is stretch wrapped to a skid.
Eye horizontal: The coil is stretched wrapped without a skid.
Ohio Coatings ships coils by truck, rail, or barge.