BS 6119 Part 1: 1981 - Glass bottles for carbonated soft drinks - 750ml and 1 litre multi-trip bottles. Recommendations - vacuity should be around 3.5% (subsequently amended by the BSI safety panel to 3.5% max - as an interim measure until BS 7367 was produced. BS 7367: 1991 - Specification for the manufacture of glass bottles for carbonated soft drinks including carbonated water. Recommendation - vacuity (now renamed "design headspace") gives a list of capacity specifications for unpasteurized and pasteurised. British Glass TEC 7 - Recommendation. The initial values in TEC 7 were the same as those in DT11. They still appear in Table 9 of TEC 7. However, anticipating that BS 7367 (Specification for the manufacture of glass bottles for carbonated soft drinks including carbonated water) would specify slightly lower values a special table was added to TEC 7 for carbonated soft drinks for new bottles. This is table 10 in TEC 7. It is the same as the recommendations in BS 7367. The original Table 9 was left in TEC 7 as the safety panel concluded that all designs currently on the market were safe and none needed withdrawal but as a precaution for the future, the slightly tighter values in BS 7367 were included for new designs. US Voluntary Product Standard PS 73-89 - Glass bottles for carbonated soft drinks - Recommendation - The headspace should not be greater than 4% of the nominal capacity (no link with capacity size in this standard). Netherlands Order 169883 June 1975 - Packaging for aerated soft drinks. Recommendation - maximum headspace should be 4.9% for capacity of 700ml or more. Various papers/reports of investigations - Submitted by Soft Drink Bottling and Brewing Associations and Glass Federation (Brian Moody). Recommendation - for a litre bottle 35ml (or 3.5%) is the best compromise headspace. Headspace for other sizes were set from work done involving those or other sizes.
