The CDL+ end was designed in 2004 at Container Development Ltd in response to the container market demands for a reduction in the consumption of aluminum without sacrificing strength and double seam performance.
Now it has transferred that expertise to MSCAN and from August 2011 has been in production at Jeddah in the Kingdom of Saudi Arabia.
 “Most beverage ends are derived from Alcoa's B64 design that evolved during the 1990s into the familiar stay-on-tab end used today in many markets. Past light-weighting was achieved by diameter reductions from 206 through 204 to the 202 size that is almost universal for soft drinks, apart from the Asia and Pacific Rim markets where the 206 is still popular.”
“The 202 design is effectively the current standard, but further cost reductions are only possible through light-weighting. For the CDL+ end a lighter aluminum gauge and clever use of the tooling enable a smaller cut edge diameter in the shell press. In effect, the CDL+ end’s production is achieved with a thinner coil used more efficiently.”
“Critical to the design is a revised forming process and shell profile that enables a gauge reduction from 0.0085 (0.216mm) to 0.0082 inches (0.208mm) while maintaining the ability to meet the internal pressure requirements of the leading soft drinks customers.”
“The intention was also to design an end in which the changes were invisible to the consumer.”
“The geometry is the deciding factor in the design. This gives a happy medium in the end performance with good buckle strength and the 100psi pressure performance.”
MSCAN’s CDL+ production line at Jeddah comprises two (2) shell presses and six (6) conversion lines with a capacity of 8.5 billion ends a year.  It is one of the world largest CDL+ end manufacturer.
“Because the end’s profile is slightly different from the current designs, its use will require some tooling changes at the filler but, no more than is necessary for maintenance changes.”
The technical changes for the customer as a result of conversion to the CDL+ end are minor.   MSCAN will assist fillers with our expertise when they install new chucks in their systems. 
“Seamers are designed for constant tool usage, and there is no provision for a rapid change from one type of can end to another. New chucks will have to be installed sooner or later anyway as the CDL+ end advances. It is merely a matter of time before it replaces the previous end as the new standard.”