Table 2

 Early evaluations of Barclay’s functioning by competing companies

ATC, American Tobacco Company; LOR, Lorillard; PM, Philip Morris; RJR, RJ Reynolds.
9 September 1980LORBarclay“… visually Barclay (1 mg) 85 appears to have 2 to 3 times as much smoke as the Carlton (1mg) 85”26
22 September 1980LORCrude tar yields for Barclay 84’s at different puff volumes“The Barclay filter generally collapses when smoked by humans which may result in higher tar deliveries”27
14 October 1980ATCMeasurement of ventilation effects, Barclay KS & Carlton (83) soft pack“The slot design of the Barclay filter when smoked by machine apparently remains intact and gives low tar delivery. However, when a smoker’s lips close around the filter and dampens it, the slots tend to close up, giving the smoker a much higher delivery of smoke”21
14 November 1980ATCBarclay cigarettes“It becomes apparent that the lips of a smoker serve to restrict air flow through the filter tip air dilution system of Barclay cigarettes by partially sealing off the four grooves in the filter, thereby causing a larger proportion of the puff volume to be drawn through the tobacco column”22
10 September 1980RJRBarclay cigarettes“…it is clear that the use of cigarette holders which apply more pressure on the filter (Chemical Division holders) results in a substantially higher TPM delivery. It appears that the pressure on the filter such as that a smoker applies during a puff causes the tipping to collapse into the groove”48
20 October 1980RJRBarclay evaluation under human smoking conditions“It was found during initial testing that pressure applied to the filter caused the tipping to collapse into the grooves, causing an increase in mouthend draft. Additionally, it was shown that TPM deliveries rose dramatically when these cigarettes were smoked with holders that applied the “squeezing” action on the filter. It was speculated that when humans smoked the cigarettes, pressure from the lips caused the same tipping collapse and thus produced smoking qualities very different from other cigarettes with ∼1 mg/cig FTC ‘tar’ deliveries… It is also speculated that an even greater increase in TPM delivery might be obtained if the smoker were allowed to manually handle the filter and further collapse the tipping through finger pressure”55
16 September 1980PMReport on the Barclay cigarette“Product smokes differently in smoker’s mouth than in dental dam of smoking machine. Smoker’s lips close channels (grooves) between tipping paper and filter lowering dilution and resulting in higher tar delivery”36
29 September 1980PMStatus of Barclay studies“This filter design results in some unusual delivery characteristics when smoked by a human that do not occur during machine smoking…The dilution decrease to the [human] smoker results in substantially higher tar delivery than would be the case of a conventionally diluted all CA [cellulose acetate] filter…Subjective impressions by flavor development have corroborated the higher tar estimates…filter process development to either duplicate or simulate the Barclay effect is in progress”40