We will study in this work the defects that can be presented more frequently in the realization of a lithography, its classification and its control. It is understood as lithography of a material, the application of a complete external lithographic system,...
One of the most used typical tests in the metagraphic sector, which may also have application in the packaging industry, is to determine the load of varnish that has been applied on the metal with which a container is to be manufactured (or has already been...
The defects produced in the tinplate varnishing (faults, “eyes”, lack of adhesion …), may be due to, among other things: – A) Dust particles on the surface of the same. – B) Excessive oil residues. –...
INTRODUCTION The reduced double tinplate has a high rigidity, characterized by a hardness measured on the Rockwell 30T scale between 70 to 80 degrees. This measurement can be made on a Rockwell 15T equipment for thicknesses less than 0.20 mm and later converted...
SUMMARY It describes tests carried out in the laboratory, with canned different vegetable preserves, carried out using containers with lids and funds from TFS, to see the behavior of the same before this material. It is concluded that this product is perfectly...
Filiform corrosion is a form of attack in which the corrosion process manifests itself in filaments and represents a particular type of anodic undercut. It is usually produced in humid environments and is more common under organic films applied on steel, aluminum,...
It is mainly interesting to examine the behavior of tinplate as a raw material for the manufacture of containers, and specifically from the point of view of corrosion. Atmospheric agents attack tinplate according to ambient humidity, average temperature,...
It is increasingly common for the container manufacturer to buy the metal to be used (tinplate, TFS or aluminum) in coils. This allows them a better use of it. In order to prepare this material properly, it is necessary to use a coil cutting line that may be your...
LIST OF ASPECTS AND SUPERFICIAL DEFECTS Summary MINOR DEFECTS: # Lines of Lüders # Brands of cold rolling cylinders # Stains or traces of degreasing or pickling # Woody appearance (“wood grain”) MAJOR DEFECTS: # Lack of fusion # Rusty...
There may be a need to determine the total amount of tin that tinplate has in each of its faces, not having specific equipment for this operation. The Clarke method allows you to find this value by counting only a basic laboratory material and a precision...
We will define in a very simple way each one of the basic concepts used in a quality control system by variables applied in the inspection of packaging. Before we will define what we understand by variables. WHAT TYPES OF VARIABLES DO WE KNOW? There are two...
