REELS, EELS

Combined label/leaflet. Delivered as a thick pressure sensitive label (either reel-fed or block cut), containing a fold-out portion which is the leaflet itself. Applied as one would apply a pressure sensitive label. These have now been around for a number of years. As far as can be ascertained, at least six patents have been taken out in this field. Recently there has been more use of multi-ply construction of these types of label, often using dissimilar materials with rather specialist adhesive systems. Probably the best known are Fix-a-Form from Denny, Peel n Reseal booklet labels, Multipeel, a peel off promotional leaflet or sticker, Dri-peel, Incore and the Double-Dri system. Leaflets use high-opacity (80%+EEL) lightweight (40-70 g/m2) coated or uncoated papers. 

REELS, ELS (reflection electron energy loss spectroscopy) and EELES, EXELES (extended electron energy loss fine structure) work with a higher fixed energy of the primary electrons (50 200 eV and 10 80 keV, respectively) and higher energy losses of the scattered primary electrons ranging from 0.005 eV to several hundred and from 200—4000 ey respectively. 

Acronyms REELS reflection electron energy loss spectroscopy (sometimes abbreviated also to EELS). 

The fine structure of the EELS can be compared to the fine sfrucfure in X-ray scattering. It can be used in purpose-built chambers or, more recently, in the TEM. In the TEM you have the great advantage of knowing where you are getting the spectrum from—it is site specific. The difficulty with TEM, as usual, is that there are usually two surfaces to consider (you can try REELS—see REM). This technique will be used more in the future with the wider availability of TEM guns with a smaller spread in... 

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