How To Implement 'Keep Away From Sunlight' On Pack Labels And In WMS

Keep Away From Sunlight is a handling instruction indicating that the package should not be exposed to direct sunlight. Implementing this instruction correctly on pack labels and within your Warehouse Management System (WMS) ensures handlers, carriers, and automated systems all follow the same protection rules.

Implementation is a combination of label design, SKU data modeling, WMS rule creation, and site-level process changes. This article focuses on pragmatic steps that fulfillment centers and 3PLs can take to make the instruction actionable rather than merely decorative.

Labeling Best Practices

Labels are the primary human-readable control. Make them unambiguous and durable:

• Phrase consistency: Use the exact phrase "Keep Away From Sunlight" or the manufacturer-prescribed wording and avoid local synonyms that can confuse handlers.
• Pictogram: Include a clear, standardized symbol (sun with a strike-through or shaded icon) adjacent to the text so language barriers are reduced.
• Placement: Place the label on at least two adjacent faces of the carton and on the top face if possible; ensure it’s not covered by straps or shrink-wrap.
• Durability: Use UV-resistant inks and laminated labels where sunlight during transit is likely; adhesive should resist heat softening.

WMS Configuration

Your WMS should store and enforce light-sensitivity attributes so the instruction flows into pick lists, slotting, and staging logic:

• SKU attribute: Create a boolean or enumerated field (e.g., "light_protection":"keep_away_from_sunlight") with associated handling codes.
• Slotting rules: Exclude affected SKUs from locations with exterior exposure; set preferred zones in the system.
• Staging restrictions: Configure the WMS to prevent allocation to dock staging bins that are flagged as "exposed" during daylight hours.
• Pick/pack prompts: Display the handling instruction on mobile devices and packing lists to ensure packers follow packing and labeling requirements.

Carrier And Outbound Controls

Ensure carriers and packhouse partners respect the instruction with these controls:

• Carrier agreements: Include handling clauses in your standard carrier terms specifying the need to avoid direct sun during temporary roadside or yard holds.
• Loading procedures: Load sensitive cartons away from door openings and use interior trailer placement rules (e.g., far from rear doors or under opaque tarps for LTL).
• Transport packaging: For long-haul shipments, consider outer packaging that blocks sunlight (opaque covers, pallet canopies) if the product risks exposure during transit.

Operational Workflows And Training

Labels and WMS changes fail without staff buy-in. Operationalize the instruction:

• Standard operating procedures: Draft clear SOPs for receiving, slotting, picking, staging, and loading that reference the WMS attribute and label language.
• Training modules: Add short visual training covering what sunlight damage looks like and how to handle affected SKUs during peak daylight operations.
• Incident response: Define steps to follow when product is found in sunlight (quarantine, inspect, document, notify merchant).

Monitoring And Continuous Improvement

Measure compliance and refine controls based on data:

• Audit logs: Use WMS event history to verify whether sun-sensitive SKUs were staged in protected zones and flag violations.
• Damage rate tracking: Track returns and damage records tied to the handling instruction to quantify improvement or identify weak points.
• Site assessment: Conduct periodic sunlight exposure mapping during peak sun months to identify windows, skylights, and doors that create hot spots.

Example Implementation

A 3PL receives cosmetics that include pigments degraded by direct sun. The merchant specifies "Keep Away From Sunlight." The 3PL adds the attribute to their item master, prints labels with a sun-strike pictogram on two faces, and sets WMS rules to exclude the SKU from staging bins with exterior exposure. Staff are trained and a daily dock audit checks for compliance. Damage claims related to sun exposure drop by 85% in the first quarter after implementation.

In short, the Keep Away From Sunlight handling instruction becomes effective only when labels, WMS, carrier agreements, and frontline procedures align. Standardized labeling, a dedicated WMS attribute, physical site controls, and routine audits convert a simple phrase into repeatable protection for light-sensitive inventory.