What does the Blank Voucher do in Balatro?

Nothing. Buying it has no in-game effect. Its only purpose is counting toward the Antimatter unlock. Redeem the Blank Voucher 10 times across runs and Antimatter enters the voucher pool.

How do you unlock Antimatter?

Buy the Blank Voucher whenever it appears in the shop. The count carries across runs, so after 10 total purchases Antimatter unlocks and starts appearing.

Is Antimatter worth the 100-dollar grind?

For high-score play, yes. Antimatter is a permanent +1 Joker slot, one of the strongest vouchers in the game. Casual players can let the count build naturally.

Do I still need the Blank Voucher after unlocking Antimatter?

Yes. Antimatter is the Blank Voucher's upgrade, so any run where you want Antimatter still needs you to buy the Blank Voucher first.

Can I buy the Blank Voucher more than once per run?

No. Every voucher caps at one purchase per run, so the 10-purchase unlock only accumulates across separate runs.

Balatro Blank Voucher & Antimatter

The Blank Voucher: no effect, the only path to Antimatter.

The Blank Voucher has no effect. You pay $10 and nothing changes. Its one job is unlocking Antimatter, the voucher that gives a permanent +1 Joker slot. Buy the Blank Voucher 10 times across your runs and Antimatter joins the shop pool.

Stats

Field	Value
Cost	$10
Effect	None
Tier	D (the unlock cost)
Upgrade	Antimatter (S-tier)

Why a voucher does nothing

Antimatter: a permanent +1 Joker slot, and the reason the Blank Voucher exists.

Antimatter raises your scoring ceiling: a sixth Joker slot is roughly 20% more scoring capacity per run, plus another target for Blueprint and Brainstorm. If it sat in the starting pool, early difficulty would collapse. So the cost lives outside scoring. You spend $100 total, $10 at a time, on a voucher that does nothing now, to permanently unlock the slot. The Blank Voucher is the price tag, not the product.

How to unlock Antimatter

Find it. The Blank Voucher sits in the base pool. A fresh voucher appears after each Boss Blind or from the Voucher Tag.
Buy it every time, even when you do not need it. The count tracks across runs in the collection menu.
Reach 10 purchases. Most players get there between run 5 and 15. Taking the Voucher Tag before a Boss Blind guarantees a fresh voucher next shop.
In the run you want Antimatter, still buy Blank first. The upgrade only appears once its base is bought.

Buy or skip?

Situation	Call
Antimatter not unlocked	Buy. Progress carries forever.
Unlocked, this run wants it	Buy. It is the switch for Antimatter.
Unlocked, this run does not	Skip. The $10 is worth more.
Ante 1-2, tight money	Skip. Early economy wins.

Synergies once you have the slot

The Blank Voucher touches nothing while you hold it. Antimatter's extra slot helps Joker Stencil (more Mult per empty slot), Showman (room to stack duplicates) and Riff-raff (somewhere to put its spawns).

Related Joker

Joker Stencil: X1 Mult per empty slot. The extra Antimatter slot raises its ceiling.

FAQ

Can a mod skip the grind?

The profile select screen has an Unlock All button that grants everything at once, but it flags the profile as cheated and blocks achievements. Mods generally leave unlocks alone.

Do Challenge runs count toward the unlock?

No. Challenge runs do not advance unlock progress. Play standard runs.

Antimatter vs +1 hand size?

Antimatter wins. A Joker slot multiplies your whole build; hand size is a flat convenience bump.

Keep reading

Tool

Voucher database: all 32 vouchers with unlocks and tiers.

Gros Michel & Cavendish: another lose-to-unlock mechanic.