Knowledge Centre
Guides, news, and insights from the RKT Grading team
Most Popular Pokémon Cards in the UK Collector Market
What UK collectors are buying, selling, and trading most in 2026.
Are Reverse Holos Worth Grading?
Reverse holographic cards are common pulls, but some of them have genuine grading value.
How Centring Is Measured in Pokémon Card Grading
A technical look at how grading companies measure card centring and what ratios you need for each grade.
Should You Clean Pokémon Cards Before Grading?
The short answer is almost certainly no. Here's why cleaning usually makes things worse.
Best Penny Sleeves and Top Loaders for Grading Submissions
The right sleeves and holders make the difference between a safe submission and a damaged card.
What Is Card Whitening and How Does It Affect Grades?
White spots on card edges and corners are the most common reason cards lose points during grading.
Pokémon Card Grading vs Selling Raw: A Profit Comparison
Real numbers comparing the profit from selling cards raw versus getting them graded first.
How Grading Protects Your Pokémon Cards Long Term
Beyond the grade itself, slabbing your cards is the best preservation method available. Here's why.
Most Underrated Pokémon Cards to Grade in 2026
These overlooked cards are flying under the radar but have genuine grading potential.
Vintage vs Modern Pokémon Cards: Which Should You Grade?
Comparing the grading potential of vintage WOTC era cards against modern Scarlet and Violet pulls.
Are Pokémon Promo Cards Worth Grading?
Promo cards, prerelease stamps, and UK exclusives can be hidden gems for grading. Here's which ones are worth submitting.
Pokémon Card Grading for Beginners: What You Need to Know
New to card grading? This covers the basics: what it is, how it works, and whether it's right for you.