Edge preparation becomes of the most important parameter which significantly influenced final practical application of tools. This article summarizes commonly used and also relatively new ways of preparation of the tools surface before and after PVD coating application. These methods are explained with respect to their advantages and limits of their application. and Odjehlení se stává nejdůležitějším parametrem, který má významný vliv na praktickou upotřebitelnost nástrojů. Článek shrnuje běžně používané a rovněž poměrně nové způsoby povrchové úpravy nástrojů před PVD povlakováním a po něm.
We report on simultaneous profiles measurements obtained in the La, Lp, MglI and Call lines in a sunspot umbra and penumbra, performed with the L. P. S. P. instrument on OSO 8. Although the statistic does not allow for a full time coverage in all lines, we are able to analyze CalI H and K shifts and intensity variations, along
with calibrated average profiles in other lines. Results are compared with other observations and predictions of the acoustic model.