| Abstract [eng] |
The present paper focuses on the research of Braille dots on cardboard with barrier properties with the aim to identify if the changes of operational performances may change the dimensions of Braille dots. For the research study, four types of cardboard with moisture, freeze and grease barrier properties and Braille printed on top were used as well as Braille dots measuring equipment was applied. To identify the wetting angle of each cardboard surface, a test using a goniometer and distilled water was carried out. The results demonstrated that changes in the storage environment of cardboard with Braille have no major impact on dimensions of Braille dots, and the Braille remained readable. The results of the wetting angle test showed that the reverse side of the cardboard is almost 1.5 times less wettable compared to the upper side. The calculations of the technological processes were performed along with evaluation of safety at work and calculations of financial/economical rates. The calculation of technology showed the required amount of equipment and personnel. According to the results, the layout plan of premises was developed. The possible risks in workplaces were evaluated, the potential level of danger was defined, and the measures required to ensure the safe working environment were identified. In the section of economic calculations, the cost of products, expenses per product and profit were determined. The obtained results of the calculations enabled to estimate a range of other important project efficiency factors such as project payback time, net present value and profitability index. |
