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Consumers generally understand that food
left out of the refrigerator on the kitchen counter will not last near as
long as food which is stored in the refrigerator. This is the fundamental
practical lesson which creates awareness of the time-temperature
relationship—a relationship which is the main principle of food safety and
freshness. The food literature contains tens of thousands of titles which
relate to time-temperature relationships of food spoilage, yet the awareness
of the importance of this concept is only recently emerging.
The first widely embraced
technology in food freshnessas perceived by the consumerwas product dating.
Now mandated in over half of the U.S. and in several European countries. Consumer
approval of date stamping has been very strong, but the knowledge of what it actually
means is lacking.
Consumer confidence in date stamping is
actually misplaced.
The classic
study of this issue stated that "...even the
most appropriate open date on a food package is insufficient. It is usually based on
some assumed average distribution condition that does not account for the various actual
distribution conditions of individual packages."
The study further concludes
"...some type of device on the package itself that would show the temperature history
of the food and indicate whether abuse has occurred and how much actual shelf-life is
left, could improve the quality delivered to the consumer"
Consumer Attitudes Favor TTIs
"...confidence in products is greatly increased, and buying
habits are dramatically affected"
Public Policy Demands TTIs
"...a matter of impending
public policy the placement of TTIs on
consumer packages"
Consumer Package TTIs Are
Cost Effective
"...cost is extremely low compared to
any other form of product value enhancement."
Practical Aspects of TTI
Incorporation in Packaging
"TTIs can put real power
into programs of product image"
Consumer Awareness is Essential
"...information on the package itself will assure that the consumer
understands"
TTIs on
Pre-packaged Perishables
"A successful program depends entirely upon the appropriate use of
automation for the
installation and activation steps."
Such a device
exists--it is the Vitsab® label, a total and
appropriate replacement for product dating and the only really effective
TTI on the market. For pennies these labels do the job of telling time and
temperature exposures. This job needs to be done for the protection of the consumer.
Ultimately, date stamping systems are inadequate, no stamped date can tell
temperature!
Temperature abuse happens to almost every product somewhere in the distribution chain, and
the consumer needs to know about it just as much as the store or warehouse manager.
Consumer Attitudes Favor TTIs
Consumer surveys have been
extensively pursued to determine if the incorporation of TTIs on packages would
improve confidence and affect buying habits. The consistent conclusion of controlled statistical surveys, and actual
experiences of retailers is that confidence in products is greatly increased, and
buying habits are dramatically affected. Take a look at some TV news
reporting that underscores this perspective:
Public
Policy Demands TTI’s
Food safety concerns have escalated in the
past year to a point that safety is foremost in the mind of the consumer. This concern is
well placed, but the focus of the where and how to attack the problems have brought
attention to the two main areas where food safety risks are increased: the distribution infrastructure,
and the food handling habits of the consumers themselves. Consumers can be temperature
abusers of perishables, but it is safe to say that they would modify their behavior if the
problems of temperature abuse in the home kitchen could be made more evident.
The issue of consumer awareness and action
was emphasized in a key statement in the 1997 release of the Food Safety Initiative paper, which stated as one of
four major challenges "
the development of in and on package sensors of food not
stored safely". This is a clear statement which endorsesas a matter of
impending public policythe placement of TTIs on consumer packages.
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The food
industry apparently has reached a point of fundamental agreement
with this perspective. Recently (July 30, 2001), an
industry executive stated: “Consumers look to food labels for
important health and safety information concerning nutrition, food
allergy and safe food handling for certain products. We think these
health and safety issues are the appropriate focus for food
labeling.” One certain way to provide this is by active labeling
of food packages with TTI's. |
Consumer Package TTIs Are
Cost Effective
TTIs used in the management of
perishable stocks in the market have proven to more than pay for themselves.
One supermarket chain in the US provided
data which shows substantial dollar savings, chain-wide, simply by shrinkage reduction in
its inventory turnover of cut salad product. Other chains have reported that the use of
TTIs with fresh fish extends the useful shelf life by two days compared to their
relatively unreliable shelf life dating systems.
So, TTIs have proven themselves as
effective tools for managing the flow of fresh product. But supermarket management should
not ignore other, perhaps more significant economies which can come with consumer TTI
labeling. Given the immense cost to retailers of declining confidence in the safety of
fresh foods, the cost of implementation of TTI programs is very small.
TTI labels costs can range down
to pennies per label, depending upon application methods and the ordering volume of the
label program. This
level of cost is extremely low compared to any other form of product value enhancement.
Unquestionably, there is significant
crossover between freshness improvement in a product, and the resulting higher safety of
that product. So, it would seem that there is no reason to deny this simple and cost
effective means to assist willing consumers.
Practical Aspects of TTI
Incorporation in Packaging
There are two ways to incorporate TTI
indicator labels on consumer packages: 1) attach an adhesive label with a generalized
consumer advisory to surface of a consumer package, or 2) incorporate a TTI indicator into
the packaging, so that printing on the package itself comprises the consumer
advisorythis is the package integrated TTI.
Adhesive labels are more expensive,
especially in smaller quantities. Cost constraints limit label size and thus the
effectiveness of the consumer advisory message. Adhesive labels, however are flexible in
their application, and are amenable to programs with in-store packaging.
Package integrated TTIs are less
costly, and can be explained to the consumer by putting a printed explanation on the
container. Integrated TTIs can put real power into programs of product image, and
thus serve a valuable function for the food processor/packager.
Consumer
Awareness is Essential
Retailers have used TTI's on packaged meat, cheese,
other dairy products, smoked fish, cut salad specialties, prepared
sandwiches and specialty health food products for over two years. Success of
these programs have depended upon consumer awareness. In one
instance, independent "exit polls" (not conducted
by the retailer) reveal that consumers were generally unaware of what the labels meant.
That specific retailer had conducted no parallel consumer education, so that there was no way with adhesive
labels to get the benefit of TTI labeling. Introduction of TTIs in consumer education
is essential for any program to be effective (see below the results of a detailed consumer
survey where leaflets placed in grocery bags were used to educated consumers).
Consumer awareness can be achieved
with integrated TTIs. The advertising for national brands, co-advertising with
cooperative retailers, and information on the package itself will assure that the consumer
understands the meaning and application of the TTI.
TTIs
on Pre-packaged Perishables Involve Automated Technology
Using Vitsab® TTIs with consumer
packaging requires label placement on packaging.
This system can be embedded in, or adhered
to, flexible packaging. Embedding requires specific heat control so that the
contents of the pouches are not heat-inactivated. Tests have shown that heat sealing which
is typical for high volume production of heat sealed flexible packaging will not harm the
Vitsab® ampoule.
Packages which have the Vitsab® unit
sealed into the closure edges can have mechanisms apply pressure to the edge to activate
the TTI, or the product can be configured as "site pre-activated" TTI. A
successful program depends entirely upon the appropriate use of automation for the
installation and activation steps.
TTIs installed in
consumer packaging are very amenable to attractive concepts for consumer attention and can
be used to create a positive image of the processor. The following image (totally
hypothetical) illustrates the concept of "image use" of an integrated TTI: 
Other packaging concepts include the
incorporation of TTI labels on the margin of vacuum formed or blow molded food containers
which are sealed with transparent films.
We have demonstrated with our own machinery the installation of a single
Vitsab® dot in a recessed "well" in vacuum formed
trays. In this application, the indicator is outside the food area and is external to the food
product, but is still associated with the packaging and is capable of reflecting the
temperature history of contained food product.
TTIs
on Supermarket Branded Products Requires Commitment from Retailer
The greatest difficulty in the
implementation of TTI programs with supermarket branded products is that it involves extra
steps. This is not a particular problem in some locations where there is substantial
commissary activity in the store--there is sufficient available labor to attend to the TTI
installation and proper activation. Other operations may encounter difficulty if there is
no labor sector within the store to which the TTI program can be assigned.
Usually a program which involves
supermarket branded products will have more success than an in-store program which calls
for the installation or activation of TTIs on nationally branded prepackaged product
which does not already incorporate a TTI in its packaging.
TTIs
on Supermarket Branded Products: A Real Life Case History
Guaranteed freshness is a compelling
marketing approachespecially when is it clear to the consumer that its not
just talk. When the market places a TTI on its own brand, and challenges the consumer to
check the freshness by reading an actual indicator, rather than accepting product date
stamping, the consumer pays attention. An actual case history proves the point.
TTI "dots" on special adhesive
labels (identified to the consumer as "freshness labels") have been used for over
four years with a supermarkets own branded products (we are not allowed to identify
the market chain). This change in consumer packaging was announced in store bulletins,
andon certain occasions--all stores put a leaflet in each shopping bag at checkout
to explain the meaning of the dots, and how they might be used in the customers own
pursuit of freshness.
After the leaflet was distributed, a
statistical survey was conducted by an independent firm. The survey was intended to
determine the response of the customers to the "dots" on the supermarkets
own products, and to see what the actual level of understanding would be of the TTI system
and its application to perishable foods.
The statistical survey revealed that--of
those who read the leaflet, 87% could repeat the information correctly. Perceived
problems with freshness on different food types ranged from 8-32% of the respondents
(dairy and meat being the greatest perceived problem). Of all consumers interviewed,
79% had a favorable response, and 17% stated that they would not purchase products which
did not contain the dot.
The significant findings with this real
world example is that consumers--when properly educated--actually use TTIs and make
significant product choice decisions based on their presence or absence.
In this excerpt from one experience with a
supermarket chain, there was only one episode of leaflet distribution. Clearly, with a
continuing program, consumer awareness and response to TTIs in packaging would
increase.
Notes
Sherlock,
M
and T. P. LaBuza, 1992. Consumer perception of consumer time-temperature indicators
for use on refrigerated dairy foods. J. Dairy Sci. 75:3167-3176.
>>Click here to view
complete paper
PDF
Quotes:
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"
The presence of a TTI on a
package would cause over 95% of the participants to have more confidence in the freshness
of that
product"
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"
96% said that they would be more
likely to purchase a product with a CT [consumer time-temperature label], and 46% said that
they would be much more likely to purchase a consumer
TTI-labeled item"
Problems with temperature abuse in the
distribution infrastructure are the subject of numerous popular and governmental
treatments. In the popular media, a case in point is the recent CBS special ("48
Hours" aired July 10, 1997) which highlighted in a dramatic and "expose"
format some glaring examples of abuse in the distribution scheme.
The Food
Safety Initiative (FDA/CFSCAN -
Report to the President May, 1997) though controversial in several areas, is a
landmark in the shifting attitudes about food safety.
Rhona
Applebaum, National Food Processors Association executive vice president
of scientific and regulatory affairs. |