Question:

Which of the following packaging is not straight/sack carton ?

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To remember this:
- Tuck end, seal end, and collapsible cartons are fully enclosed, six-sided boxes.
- A sleeve is open at both ends, like a tube, and is slid over other packaging.
  • Tuck end carton
  • Seal end carton
  • Sleeve
  • Collapsible carton
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The Correct Option is C

Solution and Explanation

Step 1: Understanding the Concept:
Cartons are paperboard-based packaging containers widely used in the food industry.
They are structurally classified into several design types based on how they are folded, closed, and sealed.

Step 2: Detailed Explanation:

Let us analyze the different types of paperboard packaging:
- Straight/Sack Cartons (including Tuck end and Seal end cartons): These are traditional, fully enclosed six-sided box containers.
A tuck end carton (A) has top and bottom flaps that fold and tuck into the body to close it.
A seal end carton (B) has flaps that are glued or sealed shut to provide a secure, tamper-evident barrier.
A collapsible carton (D) is designed to be shipped flat and erected into a fully enclosed box before filling.
- Sleeve (C): A sleeve is a tube-like paperboard packaging structure that is open at both ends.
It does not have folding end-flaps or seals of its own.
Instead, it is slid over a primary container, such as a plastic tray, tub, or another inner box.
Its primary functions are to provide a surface for product labeling, brand identification, and minor structural support.
Because it is open at both ends, a sleeve is not classified as a straight, sack, or fully enclosed carton.
Therefore, option (C) is the correct answer.

Step 3: Final Answer:

A sleeve is not classified as a straight or sack carton because it is a tube-like structure open at both ends.
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